|Residence||Westboro Apartments, Elwood City|
Bubbie (maternal grandmother)
Oliver's father (paternal grandfather)
Vingo Frensky (great-great-grandfather)
Francine's cousin (cousin)
Joshua Redman (third cousin twice removed?)
|Cartoon debut||"Francine Frensky, Superstar"|
|Voiced by||Patricia Rodriguez (s1 - s7)|
Alexina Cowan (s8 - s15)
Robyn Thaler Hickey (s16 - present)
Catherine Frensky is the older sister of Francine Frensky.
Catherine is a monkey with a brown complexion. She has long dark auburn hair and bangs, with her long hair tied into a ponytail. She usually wears a blue denim vest, a cream-colored (originally white) turtleneck, and blue pants, usually with red leg warmers.
Catherine is almost the exact opposite of Francine: she likes wearing dresses, is a very responsible person (unlike her sister), and she really loves to shop. She enjoys reading teen magazines and frequently uses the telephone. Like most sisters, Francine and Catherine go through various fights, like how to decorate their room in the episode "Francine Redecorates" and who gets the last soda; however, despite their arguments, they genuinely love each other. She briefly wore lipstick in one scene of "My Dad, the Garbage Man," nail polish in one scene of "Stolen Bike," and got a pedicure in "Muffy Gets Mature," but she usually prefers to keep her appearance natural. In "Is That Kosher?" her sleepwear is seen to be a blue nightgown.
- Francine Frensky, Superstar (first appearance)
- Meek for a Week
- My Dad, the Garbage Man
- Poor Muffy
- Stolen Bike
- Francine Frensky, Olympic Rider 20502
- Play it Again, D.W. 20602
- Arthur's TV-Free Week (Mentioned) 20701
- Arthur the Unfunny (Cameo) 21302
- Francine Redecorates
- D.W.'s Name Game
- Sue Ellen's Little Sister
- Revenge of the Chip
- Buster's Growing Grudge (mentioned)
- Arthur's Almost Live Not Real Music Festival (Cameo)
- Francine and the Feline
- Muffy's New Best Friend
- The Blizzard (cameo)
- Prunella Gets it Twice
- To Beat or Not to Beat (fantasy)
- What is that Thing?
- That's a Baby Show!
- The World Record (cameo) 50401
- The Lousy Week (mentioned) 50501
- Francine Goes to War
- Muffy Gets Mature
- Cents-less (cameo)
- According to "Vomitrocious," it is implied that Catherine is a 10th grader, as she mentioned a classmate named Lucas Hanson who vomited during math period in 5th grade, which occurred five years in the past. She also celebrates her 16th birthday in Season 18, which coincides with this implication as well as most sophomores in High School would be 15 to 16 years old during the duration of the year.
- In "Citizen Frensky," her name is spelled with a "K." It is unknown if this is the correct spelling or not, because it has also been used with a "C" in other episodes.
- She, like her family, is Jewish.
- In Play it Again, D.W. and D.W.'s Name Game, she is the babysitter for Arthur and D.W.
- The Master Builders reveals that she goes to a CTE (Career and Technical Education) school, and she wants to be a designer. Her school has a 3D printer.