Catherine Frensky

Catherine Frensky is Francine's high school-age sister. It was said that Catherine is in Grade 10 in the episode Vomitrocious.

Appearance
Catherine is described as brown monkey with red hair. She usually wears a blue shirt jacket, yellow shirt, and blue pants. She made her debut in the segment Francine Frensky, Superstar, and has appeared in subsequent segments as well.

Personality
Catherine is probably the exact opposite of Francine. She is described as girly and very responsibly. Like sisters Francine and Catherine go thorough various fights like how to decorate their room and who gets the last soda. But Catherine can help her sister see what's wrong like in episode Citizen Frensky when she took pictures of her to make her feel what it's like to be made fun of.