Extreme Omnivore: Eats a hot towel while at a sushi restaurant, and seems to enjoy it. However, in her defence, the villains had recently stolen her intelligence with their Stupidity Inducing Attack, so she at least thought it was food.
Hypocrite: One Season 3 episode has her acting like a super neat-freak and constantly nagging the girls to clean up the apartment. At the end of the episode we see her room, which is a dump that shows no signs of ever having been cleaned.
Arch-Enemy: Geraldine, and arguably Mandy. Sometimes she has a friendly rivalry with Sam.
Allergic to Routine: Clover usually gets bored easily. Perhaps this may explain why she has an obsession with boys…
Ambition Is Evil: Clover usually tries to get famous. In fact, such a behavior is strongly explicit during the episode "Model Citizens" in which Clover and Mandy compete in a beauty contest. There are many other examples though.
Jack of All Stats: Clovers suits well here. She is strong, but not the strongest. She is smart, but not the smartest. In fact, even Jerry had problems to justify her presence in the team (during the episode "Like, So Totally Not Spies").
Maybe not as ambiguous as first thought - some fans have examined screenshots of her parents, and have come to the conclusion that Alex's mom is at least half if not full Filipina, while her dad looks half-white half-Spanish.
Drives Like Crazy: Though she isn't too bad, she had a lot of trouble passing her driver's exam and is generally considered the worst driver of the three. Ironically however, she is often the one to drive.
The founder and administrator of W.O.O.H.P., the World Organization Of Human Protection, Jerry is responsible for briefing the girls on their missions.
Accidental Pervert: A milder example, but one episode has him summon the girls and recording their interactions with a camcorder. At one point, he does a close up on Sam, who happens to be in a towel in the process. Jerry is quite embarrassed over it.
Make Wrong What Once Went Right: His first appearance had him travel back in time to become Jerry's friend and convince him to create an evil version of WOOHP, the World Organization of Harming People.
Satellite Characters: They're mainly defined by being Mandy's Girl Posse. They're written out of the series after the first episode of the fifth season, Evil Graduation, and replaced by Mandy's cousin, Mindy, who's basically just liked Mandy, but with blonde hair and a thick Southern accent.