Lucy Mann

Lucy Mann first appeared during the episode Big Fat Alien Wedding. She is Camille's cousin, and comes to her wedding to perform as the flower girl.

Like Camille and Camille's parents, she is also a Sludgepuppy, but this wasn't shown until almost at the end of the episode, when Ben trips on Lucy's "feet" while they were dancing at the wedding. She is at this moment, Joel Tennyson's niece, and was one of the few Sludgepuppies not to be involved in the sabotage of the marriage.

Ben 10

 * Big Fat Alien Wedding (first appearance)

Ben 10: Omniverse

 * Mud is Thicker than Water

Trivia

 * Due to her young age, she was never involved with the Plumbers/Sludgepuppy feud and appears to have no problem with Joel and Camille's marriage.
 * She is the youngest Sludge to appear in the series.
 * The whisker marks on her face give her a striking resemblance to the female illusion form of Naruto, from the anime series of the same name.
 * Lucy bears a striking resemblance to a younger Cassie Sandsmark (aka Wonder Girl) from DC comics due to her blonde hair and her shirt, which was one of Cassie's first costumes.
 * According to Matt Wayne, Lucy's eyes went from being blue to purple because she's modeled her human look after Elizabeth Taylor, whose eyes were either blue or violet, depending on the light.