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.
Season 6 retcons her dad into being similar in appearance to her mother, thus completely shattering this trope
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.
Card-Carrying Villain: In his first appearance, Clover calls him out on the scumbag he is. His response? A small "Thank you." To be fair, he's far from the only villain in the show who exhibits this behavior.
Co-Dragons: With Boogie Gus and Helga Von Guggen in Season 4.
Hypocrite: Feels that WHOOP never appreciated his genius and the technological advances he brought to the organization, despite the fact that he used said technology for his own selfish interests.
Recurring Character: Has made more appearances than any other villain in the series to date, including Terry.
The Sociopath: Very likely, considering that his reasons for becoming evil aren't as petty as most of the other recurring villains. Most of the others suffer from (rather minor) disappointments that cause them to snap. Scam, however, is depicted as perfectly sane (for the most part) and practically kills people for its own sake.
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.
Big Bad: Once as a Future Badass where she nearly took over the world. And of the one hour Totally Busted special when she and her lackies get infected by a shampoo that makes them "spy hunters" bent on killing Sam, Clover and Alex.
Damsel in Distress: She gets mistaken for Clover and kidnapped in one episode, resulting in the Spies having to bail her out. Likewise a Halloween episode had the spies have to save her from zombies which she herself had accidentally summoned.
Evil Counterpart: Not evil per se, but Mandy is actually Clover without her redeeming qualities.
Popular Is Dumb: It's implied (and proven) that Mandy does poorly in school. She actually got straight Fs on her report card at one point, and the report was originally thought to be Alex's, which had As and Bs on it, but it turned out that there was actually a mix-up at their school.
And yet she somehow managed to graduate from high school and go to college.
The Slacker: Wants to be famous without doing any of the work. She hires an intern to pretty much do everything for her in season 6
Sixth Ranger: Yes, in one episode she wound up discovering the girls' secret and Jerry actually let her join W.H.O.O.P on the spot. Naturally she wound up being a hinderence (though pivotal in stopping that episode's Big Bad) that come the end of the mission, she begged to be released. To which she was mindwiped of the whole events.
Satellite Characters: They don't really do much for the story of the show other than being Mandy's Girl Posse and rivals to Alex and Sam, respectively. They're written out of the series after the first episode of the fifth season, Evil Graduation, and are replaced by Mandy's cousin, Mindy, who's basically just like Mandy, except she's a Dark-Skinned Blonde with a thick Southern accent.
Those Two Girls: It's shown they they have a better relationship with each other than with Mandy.