Lucy

From Wikitrix

Appearing in "My Big Fat Alien Wedding", Lucy is Camille's cousin, who arrives at her wedding to serve as the flower girl (much to Gwen's disappointment, since she was originally planned to play the part). Like Camille, she too is of the Sludgepuppies race, though this isn't shown until near the end of the episode, when Ben slips on Lucy's "feet" while dancing.

see also: Sludgepuppies, Tennyson Family