|Favorite Thing to Do||having water baloon fights with Tobias|
|Voice Actor||Zachary Gordon|
Dean is Gil's little cousin, he is the same age as Tobias, Dean is 4 years old.
Dean is a sporty, agreesive and quite an annoying Guppy, he doesn't care about important things like having a bath, brushing his teeth and other things. Dean likes to play with Tobias in the weekends and he loves to play football.
Dean has orange hair, he looks like Nonny but he has a red and green tail instead. Dean is not related to Nonny whatsoever.