Carmen

Carmen is one of the characters from the book and the series.

She is a pretentious blue weasel badmouths everybody. Her power: everything she says, happens. Her sister, Caroline, is an angel beside her. When changes to Superbadmouther (or Superplanguedevipère in French version) all wickedness and insults she said aloud become reality. Although quite a plague, Carmen shows in some episodes vulnerability it takes care to hide anyway.

Superbadmouther/Superplanguedevipère
Season 1, Episode 50

Carmen's Muscle Transformation