Incorruptible Pure Pureness: Chloe, and possibly others, seems to see Nina as this, though there are hints that there is something darker within (Sisterly Love arc). Other characters have acted to shield her from darker, or at least more mature, things.
According to demonically-empowered Chloe, Nina exudes an aura of pure innocence. Due to being a succubus, Chloe is compelled to corrupt her, but the fact that Nina is so very innocent, combined with the fact that they were pretty good friends before Chloe became demonically-empowered, causes her to have a bad reaction.
Defrosting Ice Queen: Hanging out with Tiffany gives Layla a chance to be seen outside of her usual defensive persona, which is pretty universally considered a good thing by the audience. Naturally, none of the regular cast have gotten to see this side of her yet.
During the Chloe-zombie scare, she was preapared to ditch Chloe and the others, believing it was "their problem", but forgot she was covered in Chloe's pheromones too and wound up eating her words. Whoops.
Ms. Fanservice: Always is, but she invokes it when she wants Kade to do something for her.
Oblivious To Hints: As a part of her general obliviousness. When her mom tried to let slip the Arranged Marriage business, she was dead set on immediately clearing the miscommunication which no one else had seen as a big deal. And during the Doompanties incident, Chloe had to spell out exactly what just happened after setting her up.
A succubus, who considers herself to be ugly by succubus standards (though she acknowledges that she's pretty by human standards), despite her many admirers. Much to the surprise of readers, she now has her own webcomic Spin-Off — Dangerously Chloe.
Alpha Bitch (Wannabe): Under the influence of Doom Panties instead of joining Cessily and Laura's plans for "power trio", she simply turned them into her own minions and made sure they are popular too. She's determined to take all Layla has, especially after Layla ruined her plans for Dio by humiliating her!
I'm Not Pretty: She thinks she's a "total failure" as a succubus despite seeing her makes male half of the school close to drool and Blair risks to damage his doll body by Eye Pop. Adora does indeed make her look like an awkward teen in comparison, but Chloe is far from fully developed yet.
Love Makes You Evil: Her crush on Layla's fiance Dio is what spurs her to commit evil things after accidentally putting on the Doom Panties before she is truly ready for them, unleashing a Superpowered Evil Side.
My God, What Have I Done?: After Cute WitchMagical Girl Melissa snaps her out of her feral melusine mindset, she suddenly realizes her sparring partner Ash, who'd goaded her into "going all-out" isn't breathing. This causes a major guilt-and-panic double attack with Brooke.
Take a Fourth Option: When the "Art Interlude" Guest Strips have her deal with Melissa, Layla, and Cerise who are ALL wanting to be Brooke's model (and showing their diva egos), the artist takes an award-winning approach. She paints a nude self-portrait.
Butt Monkey: Always seemed to get the short end of the stick ever since he met Nina. Even when the first met boy passing by was going to become a lab rat for Wilhelmina's demonstration, it just had to be him.
Though since his recovery from the Orb, life seems to have picked up for him a bit, to the point that he and Brookeseem to have hooked up successfully (also, the bonus feature in the print edition).
CPR Clean Pretty Reliable: When Mel (who doesn't know how to do CPR) or Brooke (who doesn't have lips) can't do this for a not-breathing Ash, Ace must.
Panty Thief: As if his character image isn't obvious enough.
Spanner in the Works / Wild Card: Blair has two cases of these which stand out. In both he showed he didn't mind interfering with the plans of others if it helped his goals or even jeopardized the good thing he had in the process.
He stole the Orb Of Tiresias from the Hellrune Coven to put the whole school into a major gender-bending fiasco that almost turned the school into his own paradise of blonde buxom bimbos, even Nina, who loved him.
When told the Doompanties were the rarest panties in the universe, he stole them off of Chloe, not caring if he lost the Heaven he was in with her. Or that he'd be locked in the box with them for a very very long time.
Heel Face Revolving Door: When with the Coven, Melissa is definitely evil in this series. When alone here, though, she tried to steal a female Kade from Layla and a male Ace from Brooke. On the other hand, she stopped Dio from being hurt badly from Ash, and stopped Snake-Girl Brooke from killing Ash (thought just barely). She's also Tiffany's "trainee" thanks to her Wand and "backup" when Tiffany was bent on staking a vampire (Mel thought is was Layla, when it was to be Dio).
Shout Out: The "Art Scholarship" interlude strips have her invoke the names of Alladin villains ("Abizmal Arbutus Mozenrath!") in a spell giving A-Cup Angst to Layla in another Heel move.
Buxom Is Better: She seems more comfortable with having bigger breasts thanks to Tia now than she did when Chloe did it earlier.
Laser-Guided Karma: She talked about having Chloe's E-cup breasts done in school colors, then rigging Chloe's bra to pop open and flash the football team. Cess is shocked when they see Chloe with smaller breasts (Chloe was tired of having to lug around those massive breasts). Eventually, Cess and Laura both get E-cups of their own thanks to Chloe, and Cess realizes how heavy they were.
And another piece of it when after she'd gotten used to them, they left once the Doompanties were sealed back in their box.
Voluntary Shapeshifter: Cess can change her hand and part of her arm to be an ice-based hammer to knock some sense into Laura when she thinks Cess should dye her hair red. Later made a lockpick icicle on her finger.
Buxom Is Better: She was happy with her new breasts. Until she lost them when the Doompanties were relocked into their box.
Again when Tia briefly gave them back—then turned around to endow them to Cessily. She was told the only way to GET them back was for Cessily to give them to Laura willingly. And shortly afterwards Tia grabs Cess before Laura can do that.
Oblivious To Hints: Tiffany apparently doesn't notice that Melissa is extremely annoyed with her, even when she all but spells it out.
Occidental Otaku: She compares what she thinks her and Layla's battle to be like to taking up 4 volumes of a manga, and gets really excited by Melissa being a real-life Magical Girl. And later seems to be a Yaoi Fangirl.
Nina and Layla's mother. She's apparently had 13 children. Not the loner sort of a vampire - she prefers to keep some company around and is unhappy about her daughters being mostly absent, that is in school or asleep.
Arranged Marriage: Formerly, between him and Layla, but it was deep-sixed, when he learned she was in love with Kade. Except his father won't allow him to return home without one of the Delacroix sisters as his bride. So he's stuck hopelessly pusuing Layla.
Flat Character: Fans have begun to regard him this way, due to a lack of characterization, compared to the rest of the cast.
Bishōnen: Certainly enough to make Layla forget about Kade.
An adorable very young dark-haired demoness (succubus?). Appeared when Cessily, Laura and Nina tried to summon Chloe back and immediately began to show who's the boss. Seems to be a competent magic user.
Apple of Discord: Delights in causing arguments; she even seems to feed off of them.
Emotion Eater: Seems to be treating a catfight as a chance for a meal.