The main reason for Carmen's creation was so that she could summon a shark to attack Kylie Mayor, using her evil trait.
Carmen was originally created with red hair and had a purple tail. Lifesimmer dyed her hair white with torquise tips and changed her scale color to light blue. Carmen is said to be bisexual, as Lifesimmer says she will woohoo both men and women. She has flirted with the maid and Kylie but no relationships resulted from either. However, Carmen moved out of household.