Profession: Member of The Pack
Voice Actor: Tara Sands
Circe is very similar to Rex, as she looks perfectly human until she starts using her powers. She has a secondary mouth which she uses to fire sonic screeches at her enemies. Her reasoning for why she has teamed up with the Pack is because she feels like too much of an outsider to go anywhere else. Rex constantly tries to get her to switch sides.
- Bad Powers, Good People: Despite her astonishingly freaky-looking mutation, she's one of the nicer EVOs. Particularly after her HeelFace Turn.
- Beauty Is Never Tarnished: Strongly averted with her powers, which rip her face open every time she uses them. Although her face always goes back to normal afterward.
- Birds of a Feather/Not So Different: With Rex.
- Conflicting Loyalty: Between Rex and Van Kleiss. Eventually she chooses Rex.
- Dark Chick: Of the Dating Catwoman variety.
- Dating Catwoman: She really does want to be friends (and also hinted to want to be even more than friends) with Rex, but the Pack isn't exactly happy with that...
- Van Kleiss, on the other hand, is more than willing to use this as part of his long-term plan to get to Rex.
- Deadpan Snarker: At times.
- Game Face: Before she uses her powers, she does this Xenomorph thing with her mouth.
- Emo Teen: Looks like one, anyway.
- HeelFace Turn: She finally sees Rex is right about Van Kleiss and quits the Pack.
- Horrible Judge of Character: She had the delusion that Van Kleiss somehow cared about her. She eventually realizes she's wrong.
- I Just Want to Be Normal: Though she seems to be missing the fact that she doesn't look anything like a monster-EVO until she voluntarily uses her powers...
- Lovecraftian Superpower: Activating her EVO abilities involves turning her lower face into a biological sonic cannon, complete with razor-sharp fangs and torn skin.
- Multicolored Hair: Black and Red (Two-toned purple in "Hard Target").
- Eerie Pale-Skinned Brunette
- Raven Hair, Ivory Skin: Save for a part of the former that's dyed deep red halfway down, but still counts, even Holiday comments how pretty she is.
- Token Good Teammate: Zig-Zagged; When she was a member of The Pack.
- Weirdness Magnet: Circe claims to be this, but it's not clear if it requires her to actually use her powers. Assuming it's passive would explain I Just Want to Be Normal, since her only means of defending herself from the Evos attracted to her would be using her more conspicuous powers. It also has some interesting implications for her relationship with Rex, who is, you'll recall, an Evo himself.
- Cthulhumanoid: Has a squid face, hence the name.
- Everyone Could See It: Apparently she had a crush on Rex when he was with the gang, and he was either oblivious or pretending to be. It's hard to say; he was kind of an asshole back then.
- Fragile Speedster: She uses her speed and kicks in combat, but can be knocked out with only a few hits.
- Kick Chick: Her main EVO ability gives her very powerful legs, which she uses to beat her enemies. She's even given Rex a hard time fighting against her.
- He Is Not My Boyfriend: With Tuck, and vice versa.
- In a Single Bound: Her main ability is jumping really high thanks to her cricket-like legs (Hence her name).