|Family||Gill Barker (twin brother)|
|Voice actor(s)||Ken Boynton|
|Game(s)||Freddi Fish 5: The Case of the Creature of Coral Cove|
Gillian Barker is Gill Barker's twin sister as shown in Freddi Fish 5: The Case of the Creature of Coral Cove. Like Gill, Gillian is a charismatic salesperson. She can be found selling either glue or plankters.