Gwendolyn 'Gwen' Tennyson is Ben's paternal cousin and Kevin's love interest, a skilled sorceress who inherited her magical 'spark' from her Anodite grandmother.

A Y indicates an appearance as a younger version of a pre-existing character.

A dark grey cell indicates the character was not in the series or film, or that the character's presence in the series or film has not yet been announced.This table shows the recurring characters and the actors who have portrayed them throughout the franchise.This is a list of characters in the universe of Cartoon Network's Ben 10 franchise.