diff --git a/src/main/java/seedu/address/logic/commands/EditCommand.java b/src/main/java/seedu/address/logic/commands/EditCommand.java
index 4b581c7331e..7af50ba77ab 100644
--- a/src/main/java/seedu/address/logic/commands/EditCommand.java
+++ b/src/main/java/seedu/address/logic/commands/EditCommand.java
@@ -26,6 +26,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.person.Remark;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -99,9 +100,10 @@ private static Person createEditedPerson(Person personToEdit, EditPersonDescript
         Phone updatedPhone = editPersonDescriptor.getPhone().orElse(personToEdit.getPhone());
         Email updatedEmail = editPersonDescriptor.getEmail().orElse(personToEdit.getEmail());
         Address updatedAddress = editPersonDescriptor.getAddress().orElse(personToEdit.getAddress());
+        Remark updatedRemark = personToEdit.getRemark();
         Set<Tag> updatedTags = editPersonDescriptor.getTags().orElse(personToEdit.getTags());
 
-        return new Person(updatedName, updatedPhone, updatedEmail, updatedAddress, updatedTags);
+        return new Person(updatedName, updatedPhone, updatedEmail, updatedAddress, updatedRemark, updatedTags);
     }
 
     @Override
diff --git a/src/main/java/seedu/address/logic/commands/RemarkCommand.java b/src/main/java/seedu/address/logic/commands/RemarkCommand.java
new file mode 100644
index 00000000000..0fc63ec3d01
--- /dev/null
+++ b/src/main/java/seedu/address/logic/commands/RemarkCommand.java
@@ -0,0 +1,95 @@
+package seedu.address.logic.commands;
+
+import static seedu.address.commons.util.CollectionUtil.requireAllNonNull;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_REMARK;
+import static seedu.address.model.Model.PREDICATE_SHOW_ALL_PERSONS;
+
+import java.util.List;
+
+import seedu.address.commons.core.index.Index;
+import seedu.address.logic.Messages;
+import seedu.address.logic.commands.exceptions.CommandException;
+import seedu.address.model.Model;
+import seedu.address.model.person.Person;
+import seedu.address.model.person.Remark;
+
+/**
+ * Changes the remark of an existing person in the address book.
+ */
+public class RemarkCommand extends Command {
+
+    public static final String COMMAND_WORD = "remark";
+
+    public static final String MESSAGE_USAGE = COMMAND_WORD + ": Edits the remark of the person identified "
+            + "by the index number used in the last person listing. "
+            + "Existing remark will be overwritten by the input.\n"
+            + "Parameters: INDEX (must be a positive integer) "
+            + PREFIX_REMARK + "[REMARK]\n"
+            + "Example: " + COMMAND_WORD + " 1 "
+            + PREFIX_REMARK + "Likes to swim.";
+
+    public static final String MESSAGE_ARGUMENTS = "Index: %1$d, Remark: %2$s";
+    public static final String MESSAGE_ADD_REMARK_SUCCESS = "Added remark to Person: %1$s";
+    public static final String MESSAGE_DELETE_REMARK_SUCCESS = "Removed remark from Person: %1$s";
+
+    private final Index index;
+    private final Remark remark;
+
+    /**
+     * @param index of the person in the filtered person list to edit the remark
+     * @param remark of the person to be updated to
+     */
+    public RemarkCommand(Index index, Remark remark) {
+        requireAllNonNull(index, remark);
+        this.index = index;
+        this.remark = remark;
+    }
+
+    @Override
+    public CommandResult execute(Model model) throws CommandException {
+        List<Person> lastShownList = model.getFilteredPersonList();
+
+        if (index.getZeroBased() >= lastShownList.size()) {
+            throw new CommandException(Messages.MESSAGE_INVALID_PERSON_DISPLAYED_INDEX);
+        }
+
+        Person personToEdit = lastShownList.get(index.getZeroBased());
+        Person editedPerson = new Person(
+                personToEdit.getName(), personToEdit.getPhone(), personToEdit.getEmail(),
+                personToEdit.getAddress(), remark, personToEdit.getTags());
+
+        model.setPerson(personToEdit, editedPerson);
+        model.updateFilteredPersonList(PREDICATE_SHOW_ALL_PERSONS);
+
+        return new CommandResult(generateSuccessMessage(editedPerson));
+    }
+
+    /**
+     * Generates a command execution success message based on whether
+     * the remark is added to or removed from
+     * {@code personToEdit}.
+     */
+    private String generateSuccessMessage(Person personToEdit) {
+        String message = !remark.value.isEmpty() ? MESSAGE_ADD_REMARK_SUCCESS : MESSAGE_DELETE_REMARK_SUCCESS;
+        return String.format(message, Messages.format(personToEdit));
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        // short circuit if same object
+        if (other == this) {
+            return true;
+        }
+
+        // instanceof handles nulls
+        if (!(other instanceof RemarkCommand)) {
+            return false;
+        }
+
+        // state check
+        RemarkCommand e = (RemarkCommand) other;
+        return index.equals(e.index)
+                && remark.equals(e.remark);
+    }
+}
+
diff --git a/src/main/java/seedu/address/logic/parser/AddCommandParser.java b/src/main/java/seedu/address/logic/parser/AddCommandParser.java
index 4ff1a97ed77..4bdbd2a1d13 100644
--- a/src/main/java/seedu/address/logic/parser/AddCommandParser.java
+++ b/src/main/java/seedu/address/logic/parser/AddCommandParser.java
@@ -17,6 +17,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.person.Remark;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -43,9 +44,10 @@ public AddCommand parse(String args) throws ParseException {
         Phone phone = ParserUtil.parsePhone(argMultimap.getValue(PREFIX_PHONE).get());
         Email email = ParserUtil.parseEmail(argMultimap.getValue(PREFIX_EMAIL).get());
         Address address = ParserUtil.parseAddress(argMultimap.getValue(PREFIX_ADDRESS).get());
+        Remark remark = new Remark("");
         Set<Tag> tagList = ParserUtil.parseTags(argMultimap.getAllValues(PREFIX_TAG));
 
-        Person person = new Person(name, phone, email, address, tagList);
+        Person person = new Person(name, phone, email, address, remark, tagList);
 
         return new AddCommand(person);
     }
diff --git a/src/main/java/seedu/address/logic/parser/AddressBookParser.java b/src/main/java/seedu/address/logic/parser/AddressBookParser.java
index 3149ee07e0b..632c90e6550 100644
--- a/src/main/java/seedu/address/logic/parser/AddressBookParser.java
+++ b/src/main/java/seedu/address/logic/parser/AddressBookParser.java
@@ -17,6 +17,7 @@
 import seedu.address.logic.commands.FindCommand;
 import seedu.address.logic.commands.HelpCommand;
 import seedu.address.logic.commands.ListCommand;
+import seedu.address.logic.commands.RemarkCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 
 /**
@@ -68,6 +69,9 @@ public Command parseCommand(String userInput) throws ParseException {
         case FindCommand.COMMAND_WORD:
             return new FindCommandParser().parse(arguments);
 
+        case RemarkCommand.COMMAND_WORD:
+            return new RemarkCommandParser().parse(arguments);
+
         case ListCommand.COMMAND_WORD:
             return new ListCommand();
 
diff --git a/src/main/java/seedu/address/logic/parser/CliSyntax.java b/src/main/java/seedu/address/logic/parser/CliSyntax.java
index 75b1a9bf119..d1631e40cd6 100644
--- a/src/main/java/seedu/address/logic/parser/CliSyntax.java
+++ b/src/main/java/seedu/address/logic/parser/CliSyntax.java
@@ -10,6 +10,7 @@ public class CliSyntax {
     public static final Prefix PREFIX_PHONE = new Prefix("p/");
     public static final Prefix PREFIX_EMAIL = new Prefix("e/");
     public static final Prefix PREFIX_ADDRESS = new Prefix("a/");
+    public static final Prefix PREFIX_REMARK = new Prefix("r/");
     public static final Prefix PREFIX_TAG = new Prefix("t/");
 
 }
diff --git a/src/main/java/seedu/address/logic/parser/RemarkCommandParser.java b/src/main/java/seedu/address/logic/parser/RemarkCommandParser.java
new file mode 100644
index 00000000000..cd801ac889a
--- /dev/null
+++ b/src/main/java/seedu/address/logic/parser/RemarkCommandParser.java
@@ -0,0 +1,37 @@
+package seedu.address.logic.parser;
+
+import static java.util.Objects.requireNonNull;
+import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_REMARK;
+
+import seedu.address.commons.core.index.Index;
+import seedu.address.commons.exceptions.IllegalValueException;
+import seedu.address.logic.commands.RemarkCommand;
+import seedu.address.logic.parser.exceptions.ParseException;
+import seedu.address.model.person.Remark;
+
+/**
+ * Parses input arguments and creates a new {@code RemarkCommand} object
+ */
+public class RemarkCommandParser implements Parser<RemarkCommand> {
+    /**
+     * Parses the given {@code String} of arguments in the context of the {@code RemarkCommand}
+     * and returns a {@code RemarkCommand} object for execution.
+     * @throws ParseException if the user input does not conform the expected format
+     */
+    public RemarkCommand parse(String args) throws ParseException {
+        requireNonNull(args);
+        ArgumentMultimap argMultimap = ArgumentTokenizer.tokenize(args, PREFIX_REMARK);
+
+        Index index;
+        try {
+            index = ParserUtil.parseIndex(argMultimap.getPreamble());
+        } catch (IllegalValueException ive) {
+            throw new ParseException(String.format(MESSAGE_INVALID_COMMAND_FORMAT, RemarkCommand.MESSAGE_USAGE), ive);
+        }
+
+        String remark = argMultimap.getValue(PREFIX_REMARK).orElse("");
+
+        return new RemarkCommand(index, new Remark(remark));
+    }
+}
diff --git a/src/main/java/seedu/address/model/person/Person.java b/src/main/java/seedu/address/model/person/Person.java
index abe8c46b535..b09332dce6d 100644
--- a/src/main/java/seedu/address/model/person/Person.java
+++ b/src/main/java/seedu/address/model/person/Person.java
@@ -23,17 +23,19 @@ public class Person {
 
     // Data fields
     private final Address address;
+    private final Remark remark;
     private final Set<Tag> tags = new HashSet<>();
 
     /**
      * Every field must be present and not null.
      */
-    public Person(Name name, Phone phone, Email email, Address address, Set<Tag> tags) {
+    public Person(Name name, Phone phone, Email email, Address address, Remark remark, Set<Tag> tags) {
         requireAllNonNull(name, phone, email, address, tags);
         this.name = name;
         this.phone = phone;
         this.email = email;
         this.address = address;
+        this.remark = remark;
         this.tags.addAll(tags);
     }
 
@@ -53,6 +55,10 @@ public Address getAddress() {
         return address;
     }
 
+    public Remark getRemark() {
+        return remark;
+    }
+
     /**
      * Returns an immutable tag set, which throws {@code UnsupportedOperationException}
      * if modification is attempted.
@@ -110,6 +116,7 @@ public String toString() {
                 .add("phone", phone)
                 .add("email", email)
                 .add("address", address)
+                .add("remark", remark)
                 .add("tags", tags)
                 .toString();
     }
diff --git a/src/main/java/seedu/address/model/person/Remark.java b/src/main/java/seedu/address/model/person/Remark.java
new file mode 100644
index 00000000000..c8fd1193895
--- /dev/null
+++ b/src/main/java/seedu/address/model/person/Remark.java
@@ -0,0 +1,33 @@
+package seedu.address.model.person;
+
+import static java.util.Objects.requireNonNull;
+
+/**
+ * Represents a Person's remark in the address book.
+ * Guarantees: immutable; is always valid
+ */
+public class Remark {
+    public final String value;
+
+    public Remark(String remark) {
+        requireNonNull(remark);
+        value = remark;
+    }
+
+    @Override
+    public String toString() {
+        return value;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        return other == this // short circuit if same object
+                || (other instanceof Remark // instanceof handles nulls
+                && value.equals(((Remark) other).value)); // state check
+    }
+
+    @Override
+    public int hashCode() {
+        return value.hashCode();
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/seedu/address/model/util/SampleDataUtil.java b/src/main/java/seedu/address/model/util/SampleDataUtil.java
index 1806da4facf..7225020bb0d 100644
--- a/src/main/java/seedu/address/model/util/SampleDataUtil.java
+++ b/src/main/java/seedu/address/model/util/SampleDataUtil.java
@@ -11,32 +11,36 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.person.Remark;
 import seedu.address.model.tag.Tag;
 
 /**
  * Contains utility methods for populating {@code AddressBook} with sample data.
  */
 public class SampleDataUtil {
+
+    public static final Remark EMPTY_REMARK = new Remark("");
+
     public static Person[] getSamplePersons() {
         return new Person[] {
-            new Person(new Name("Alex Yeoh"), new Phone("87438807"), new Email("alexyeoh@example.com"),
-                new Address("Blk 30 Geylang Street 29, #06-40"),
-                getTagSet("friends")),
-            new Person(new Name("Bernice Yu"), new Phone("99272758"), new Email("berniceyu@example.com"),
-                new Address("Blk 30 Lorong 3 Serangoon Gardens, #07-18"),
-                getTagSet("colleagues", "friends")),
-            new Person(new Name("Charlotte Oliveiro"), new Phone("93210283"), new Email("charlotte@example.com"),
-                new Address("Blk 11 Ang Mo Kio Street 74, #11-04"),
-                getTagSet("neighbours")),
-            new Person(new Name("David Li"), new Phone("91031282"), new Email("lidavid@example.com"),
-                new Address("Blk 436 Serangoon Gardens Street 26, #16-43"),
-                getTagSet("family")),
-            new Person(new Name("Irfan Ibrahim"), new Phone("92492021"), new Email("irfan@example.com"),
-                new Address("Blk 47 Tampines Street 20, #17-35"),
-                getTagSet("classmates")),
-            new Person(new Name("Roy Balakrishnan"), new Phone("92624417"), new Email("royb@example.com"),
-                new Address("Blk 45 Aljunied Street 85, #11-31"),
-                getTagSet("colleagues"))
+                new Person(new Name("Alex Yeoh"), new Phone("87438807"), new Email("alexyeoh@example.com"),
+                        new Address("Blk 30 Geylang Street 29, #06-40"), EMPTY_REMARK,
+                        getTagSet("friends")),
+                new Person(new Name("Bernice Yu"), new Phone("99272758"), new Email("berniceyu@example.com"),
+                        new Address("Blk 30 Lorong 3 Serangoon Gardens, #07-18"), EMPTY_REMARK,
+                        getTagSet("colleagues", "friends")),
+                new Person(new Name("Charlotte Oliveiro"), new Phone("93210283"), new Email("charlotte@example.com"),
+                        new Address("Blk 11 Ang Mo Kio Street 74, #11-04"), EMPTY_REMARK,
+                        getTagSet("neighbours")),
+                new Person(new Name("David Li"), new Phone("91031282"), new Email("lidavid@example.com"),
+                        new Address("Blk 436 Serangoon Gardens Street 26, #16-43"), EMPTY_REMARK,
+                        getTagSet("family")),
+                new Person(new Name("Irfan Ibrahim"), new Phone("92492021"), new Email("irfan@example.com"),
+                        new Address("Blk 47 Tampines Street 20, #17-35"), EMPTY_REMARK,
+                        getTagSet("classmates")),
+                new Person(new Name("Roy Balakrishnan"), new Phone("92624417"), new Email("royb@example.com"),
+                        new Address("Blk 45 Aljunied Street 85, #11-31"), EMPTY_REMARK,
+                        getTagSet("colleagues"))
         };
     }
 
diff --git a/src/main/java/seedu/address/storage/JsonAdaptedPerson.java b/src/main/java/seedu/address/storage/JsonAdaptedPerson.java
index bd1ca0f56c8..9d97aab47a4 100644
--- a/src/main/java/seedu/address/storage/JsonAdaptedPerson.java
+++ b/src/main/java/seedu/address/storage/JsonAdaptedPerson.java
@@ -15,6 +15,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.person.Remark;
 import seedu.address.model.tag.Tag;
 
 /**
@@ -102,8 +103,10 @@ public Person toModelType() throws IllegalValueException {
         }
         final Address modelAddress = new Address(address);
 
+        final Remark modelRemark = new Remark(""); //TODO: Implement parsing and marshalling in the storage commit
+
         final Set<Tag> modelTags = new HashSet<>(personTags);
-        return new Person(modelName, modelPhone, modelEmail, modelAddress, modelTags);
+        return new Person(modelName, modelPhone, modelEmail, modelAddress, modelRemark, modelTags);
     }
 
 }
diff --git a/src/main/java/seedu/address/ui/PersonCard.java b/src/main/java/seedu/address/ui/PersonCard.java
index 094c42cda82..ed9a621d3a0 100644
--- a/src/main/java/seedu/address/ui/PersonCard.java
+++ b/src/main/java/seedu/address/ui/PersonCard.java
@@ -40,6 +40,8 @@ public class PersonCard extends UiPart<Region> {
     private Label email;
     @FXML
     private FlowPane tags;
+    @FXML
+    private Label remark;
 
     /**
      * Creates a {@code PersonCode} with the given {@code Person} and index to display.
@@ -51,6 +53,7 @@ public PersonCard(Person person, int displayedIndex) {
         name.setText(person.getName().fullName);
         phone.setText(person.getPhone().value);
         address.setText(person.getAddress().value);
+        remark.setText(person.getRemark().value);
         email.setText(person.getEmail().value);
         person.getTags().stream()
                 .sorted(Comparator.comparing(tag -> tag.tagName))
diff --git a/src/main/resources/view/PersonListCard.fxml b/src/main/resources/view/PersonListCard.fxml
index 84e09833a87..f2bfee435b7 100644
--- a/src/main/resources/view/PersonListCard.fxml
+++ b/src/main/resources/view/PersonListCard.fxml
@@ -31,6 +31,7 @@
       <Label fx:id="phone" styleClass="cell_small_label" text="\$phone" />
       <Label fx:id="address" styleClass="cell_small_label" text="\$address" />
       <Label fx:id="email" styleClass="cell_small_label" text="\$email" />
+      <Label fx:id="remark" styleClass="cell_small_label" text="\$remark" />
     </VBox>
   </GridPane>
 </HBox>
diff --git a/src/test/java/seedu/address/logic/commands/CommandTestUtil.java b/src/test/java/seedu/address/logic/commands/CommandTestUtil.java
index 643a1d08069..313b370a7a8 100644
--- a/src/test/java/seedu/address/logic/commands/CommandTestUtil.java
+++ b/src/test/java/seedu/address/logic/commands/CommandTestUtil.java
@@ -34,6 +34,8 @@ public class CommandTestUtil {
     public static final String VALID_EMAIL_BOB = "bob@example.com";
     public static final String VALID_ADDRESS_AMY = "Block 312, Amy Street 1";
     public static final String VALID_ADDRESS_BOB = "Block 123, Bobby Street 3";
+    public static final String VALID_REMARK_AMY = "Like skiing.";
+    public static final String VALID_REMARK_BOB = "Favourite pastime: Eating";
     public static final String VALID_TAG_HUSBAND = "husband";
     public static final String VALID_TAG_FRIEND = "friend";
 
diff --git a/src/test/java/seedu/address/logic/commands/RemarkCommandTest.java b/src/test/java/seedu/address/logic/commands/RemarkCommandTest.java
new file mode 100644
index 00000000000..c52dfa2d6c2
--- /dev/null
+++ b/src/test/java/seedu/address/logic/commands/RemarkCommandTest.java
@@ -0,0 +1,58 @@
+package seedu.address.logic.commands;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import static seedu.address.logic.commands.CommandTestUtil.VALID_REMARK_AMY;
+import static seedu.address.logic.commands.CommandTestUtil.VALID_REMARK_BOB;
+import static seedu.address.logic.commands.CommandTestUtil.assertCommandFailure;
+import static seedu.address.logic.commands.RemarkCommand.MESSAGE_ARGUMENTS;
+import static seedu.address.testutil.TypicalIndexes.INDEX_FIRST_PERSON;
+import static seedu.address.testutil.TypicalIndexes.INDEX_SECOND_PERSON;
+import static seedu.address.testutil.TypicalPersons.getTypicalAddressBook;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.model.Model;
+import seedu.address.model.ModelManager;
+import seedu.address.model.UserPrefs;
+import seedu.address.model.person.Remark;
+
+/**
+ * Contains integration tests (interaction with the Model) and unit tests for RemarkCommand.
+ */
+public class RemarkCommandTest {
+    private Model model = new ModelManager(getTypicalAddressBook(), new UserPrefs());
+
+    @Test
+    public void execute() {
+        final Remark remark = new Remark("Some remark");
+
+        assertCommandFailure(new RemarkCommand(INDEX_FIRST_PERSON, remark), model,
+                String.format(MESSAGE_ARGUMENTS, INDEX_FIRST_PERSON.getOneBased(), remark));
+    }
+
+    @Test
+    public void equals() {
+        final RemarkCommand standardCommand = new RemarkCommand(INDEX_FIRST_PERSON, new Remark(VALID_REMARK_AMY));
+
+        // same values -> returns true
+        RemarkCommand commandWithSameValues = new RemarkCommand(INDEX_FIRST_PERSON, new Remark(VALID_REMARK_AMY));
+        assertTrue(standardCommand.equals(commandWithSameValues));
+
+        // same object -> returns true
+        assertTrue(standardCommand.equals(standardCommand));
+
+        // null -> returns false
+        assertFalse(standardCommand.equals(null));
+
+        // different types -> returns false
+        assertFalse(standardCommand.equals(new ClearCommand()));
+
+        // different index -> returns false
+        assertFalse(standardCommand.equals(new RemarkCommand(INDEX_SECOND_PERSON, new Remark(VALID_REMARK_AMY))));
+
+        // different remark -> returns false
+        assertFalse(standardCommand.equals(new RemarkCommand(INDEX_FIRST_PERSON, new Remark(VALID_REMARK_BOB))));
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/seedu/address/logic/parser/AddressBookParserTest.java b/src/test/java/seedu/address/logic/parser/AddressBookParserTest.java
index 5a1ab3dbc0c..bd88590fee6 100644
--- a/src/test/java/seedu/address/logic/parser/AddressBookParserTest.java
+++ b/src/test/java/seedu/address/logic/parser/AddressBookParserTest.java
@@ -4,6 +4,7 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
 import static seedu.address.logic.Messages.MESSAGE_UNKNOWN_COMMAND;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_REMARK;
 import static seedu.address.testutil.Assert.assertThrows;
 import static seedu.address.testutil.TypicalIndexes.INDEX_FIRST_PERSON;
 
@@ -22,9 +23,11 @@
 import seedu.address.logic.commands.FindCommand;
 import seedu.address.logic.commands.HelpCommand;
 import seedu.address.logic.commands.ListCommand;
+import seedu.address.logic.commands.RemarkCommand;
 import seedu.address.logic.parser.exceptions.ParseException;
 import seedu.address.model.person.NameContainsKeywordsPredicate;
 import seedu.address.model.person.Person;
+import seedu.address.model.person.Remark;
 import seedu.address.testutil.EditPersonDescriptorBuilder;
 import seedu.address.testutil.PersonBuilder;
 import seedu.address.testutil.PersonUtil;
@@ -88,6 +91,14 @@ public void parseCommand_list() throws Exception {
         assertTrue(parser.parseCommand(ListCommand.COMMAND_WORD + " 3") instanceof ListCommand);
     }
 
+    @Test
+    public void parseCommand_remark() throws Exception {
+        final Remark remark = new Remark("Some remark.");
+        RemarkCommand command = (RemarkCommand) parser.parseCommand(RemarkCommand.COMMAND_WORD + " "
+                + INDEX_FIRST_PERSON.getOneBased() + " " + PREFIX_REMARK + remark.value);
+        assertEquals(new RemarkCommand(INDEX_FIRST_PERSON, remark), command);
+    }
+
     @Test
     public void parseCommand_unrecognisedInput_throwsParseException() {
         assertThrows(ParseException.class, String.format(MESSAGE_INVALID_COMMAND_FORMAT, HelpCommand.MESSAGE_USAGE), ()
diff --git a/src/test/java/seedu/address/logic/parser/RemarkCommandParserTest.java b/src/test/java/seedu/address/logic/parser/RemarkCommandParserTest.java
new file mode 100644
index 00000000000..3bab6e833e5
--- /dev/null
+++ b/src/test/java/seedu/address/logic/parser/RemarkCommandParserTest.java
@@ -0,0 +1,43 @@
+package seedu.address.logic.parser;
+
+import static seedu.address.logic.Messages.MESSAGE_INVALID_COMMAND_FORMAT;
+import static seedu.address.logic.parser.CliSyntax.PREFIX_REMARK;
+import static seedu.address.logic.parser.CommandParserTestUtil.assertParseFailure;
+import static seedu.address.logic.parser.CommandParserTestUtil.assertParseSuccess;
+import static seedu.address.testutil.TypicalIndexes.INDEX_FIRST_PERSON;
+
+import org.junit.jupiter.api.Test;
+
+import seedu.address.commons.core.index.Index;
+import seedu.address.logic.commands.RemarkCommand;
+import seedu.address.model.person.Remark;
+
+public class RemarkCommandParserTest {
+    private RemarkCommandParser parser = new RemarkCommandParser();
+    private final String nonEmptyRemark = "Some remark.";
+
+    @Test
+    public void parse_indexSpecified_success() {
+        // have remark
+        Index targetIndex = INDEX_FIRST_PERSON;
+        String userInput = targetIndex.getOneBased() + " " + PREFIX_REMARK + nonEmptyRemark;
+        RemarkCommand expectedCommand = new RemarkCommand(INDEX_FIRST_PERSON, new Remark(nonEmptyRemark));
+        assertParseSuccess(parser, userInput, expectedCommand);
+
+        // no remark
+        userInput = targetIndex.getOneBased() + " " + PREFIX_REMARK;
+        expectedCommand = new RemarkCommand(INDEX_FIRST_PERSON, new Remark(""));
+        assertParseSuccess(parser, userInput, expectedCommand);
+    }
+
+    @Test
+    public void parse_missingCompulsoryField_failure() {
+        String expectedMessage = String.format(MESSAGE_INVALID_COMMAND_FORMAT, RemarkCommand.MESSAGE_USAGE);
+
+        // no parameters
+        assertParseFailure(parser, RemarkCommand.COMMAND_WORD, expectedMessage);
+
+        // no index
+        assertParseFailure(parser, RemarkCommand.COMMAND_WORD + " " + nonEmptyRemark, expectedMessage);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/seedu/address/model/person/RemarkTest.java b/src/test/java/seedu/address/model/person/RemarkTest.java
new file mode 100644
index 00000000000..3ccf26caf0c
--- /dev/null
+++ b/src/test/java/seedu/address/model/person/RemarkTest.java
@@ -0,0 +1,31 @@
+package seedu.address.model.person;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+public class RemarkTest {
+
+    @Test
+    public void equals() {
+        Remark remark = new Remark("Hello");
+
+        // same object -> returns true
+        assertTrue(remark.equals(remark));
+
+        // same values -> returns true
+        Remark remarkCopy = new Remark(remark.value);
+        assertTrue(remark.equals(remarkCopy));
+
+        // different types -> returns false
+        assertFalse(remark.equals(1));
+
+        // null -> returns false
+        assertFalse(remark.equals(null));
+
+        // different remark -> returns false
+        Remark differentRemark = new Remark("Bye");
+        assertFalse(remark.equals(differentRemark));
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/seedu/address/testutil/PersonBuilder.java b/src/test/java/seedu/address/testutil/PersonBuilder.java
index 6be381d39ba..ef336cfb156 100644
--- a/src/test/java/seedu/address/testutil/PersonBuilder.java
+++ b/src/test/java/seedu/address/testutil/PersonBuilder.java
@@ -8,6 +8,7 @@
 import seedu.address.model.person.Name;
 import seedu.address.model.person.Person;
 import seedu.address.model.person.Phone;
+import seedu.address.model.person.Remark;
 import seedu.address.model.tag.Tag;
 import seedu.address.model.util.SampleDataUtil;
 
@@ -20,11 +21,13 @@ public class PersonBuilder {
     public static final String DEFAULT_PHONE = "85355255";
     public static final String DEFAULT_EMAIL = "amy@gmail.com";
     public static final String DEFAULT_ADDRESS = "123, Jurong West Ave 6, #08-111";
+    public static final String DEFAULT_REMARK = "";
 
     private Name name;
     private Phone phone;
     private Email email;
     private Address address;
+    private Remark remark;
     private Set<Tag> tags;
 
     /**
@@ -35,6 +38,7 @@ public PersonBuilder() {
         phone = new Phone(DEFAULT_PHONE);
         email = new Email(DEFAULT_EMAIL);
         address = new Address(DEFAULT_ADDRESS);
+        remark = new Remark(DEFAULT_REMARK);
         tags = new HashSet<>();
     }
 
@@ -46,6 +50,7 @@ public PersonBuilder(Person personToCopy) {
         phone = personToCopy.getPhone();
         email = personToCopy.getEmail();
         address = personToCopy.getAddress();
+        remark = personToCopy.getRemark();
         tags = new HashSet<>(personToCopy.getTags());
     }
 
@@ -89,8 +94,16 @@ public PersonBuilder withEmail(String email) {
         return this;
     }
 
+    /**
+     * Sets the {@code Remark} of the {@code Person} that we are building.
+     */
+    public PersonBuilder withRemark(String remark) {
+        this.remark = new Remark(remark);
+        return this;
+    }
+
     public Person build() {
-        return new Person(name, phone, email, address, tags);
+        return new Person(name, phone, email, address, remark, tags);
     }
 
 }