Cousin has mid-length, red brown hair, light skin and brown eyes. Usually, she wears a blue top.
Main Character, Party-Girl Sister, Bookish Sister and Brother are her cousins. She's always been jealous of them because she thinks that Nana loved them more than her. Now, after Nana's death, she tries to get the whole inheritance for herself by sabotaging her cousins' tasks.
Aunt is Cousin's mother. She treats her daughter very poorly and states that she's always been a constant disappointment.
When they meet, Cousin acts very coldly to Chaz but he seems interested in her and looks happy any time he sees her. Probably, Chaz is the first person - besides her Nana - who really cares about Cousin and doesn't make her feel less of a person.