Berserk Button: Don't bring up superstition in her presence- she was on the receiving end of too much of it. Also, her dhampir nature makes the presence of a vampire a major Berserk Button.
Broken Bird: Her childhood as the village freak was hardly fun, and it's left definite psychological scars on her.
Cute Monster Girl: Magiere's looks are greatly enhanced by her Supernatural nature, on the other hand, that same otherworldly beauty (coupled with extremely pale skin) can be very off putting to most people.
Dark Is Not Evil: She's creepy and broody even if you don't know she's half-vampire, but she's at least trying to be a good person.
Dhampyr: Her dad was a vampire, her mom was human. The title of the first book says it all.
Jerk with a Heart of Gold: Magiere can be harsh and abrasive, but she'll usually at least try to do the right thing after finding out vampires actually exist and are a real threat.
Eerie Pale-Skinned Brunette: Her skin is unnaturally pale no matter how much time she spends in the sun, and her hair is mostly jet black with red streaks that show up under certain lighting. It's a hold-over from her vampire heritage and is generally very eerie.
Abusive Parents: He was brutally abused by his father, which fueled his bitter misanthropy.
Blood Knight: Chane loves to fight and kill, and isn't picky about who. In the second arc he's started blunting this trait, for Wynn's sake.
The Dragon: At first to his sire, Toret, and after his death to Welstiel
Heel Realization: Admits that he's a monster at the end of the first arc. As noted in Retired Monster above, though, it doesn't make him any less evil in a meaningful sense, just less blatant and feral about it.
Karma Houdini: So far, he's had remarkably little punishment to fit his crimes- but on the other hand, the series is far from over...
Living Lie Detector: One of his vampiric powers, which first begins manifesting in Child of a Dead God.
Magic Knight: A talented conjurer as well as a skilled, superhumanly strong warrior.
Morality Pet: Wynn is the only thing he cares about enough to try and control his feral vampire nature.
Psycho for Hire: In the first arc, he works as muscle and savagery for both Toret and Welstiel. In subsequent arcs, he's at least trying to improve his behavior.
Retired Monster: In the second arc, owing to trying to make a good impression on Wynn. He's not actually any less evil, though, just less blatant about it. At the end of the arc he has an epiphany, and appears to have genuinely graduated to The Atoner.
Scars Are Forever: Though vampires can normally heal any wound, the scars on Chane's back and neck will last forever.
The Sociopath: Borderline case. His relationship with Wynn shows he's capable of at least some empathy- he just normally doesn't bother, since he doesn't think most people are worth it.
Omnicidal Maniac: Implied; it talks about the end of existence in such a way that it's clearly anticipating it, and there are, after all, only so many goals for which "create an undead army that will consume everything in its path, then devour itself when it can't get anything else" is an effective strategy, after all.
Scaled Up: Usually appears as an immense serpent. It's unclear if that is its true form or not.
Sealed Evil in a Can: The precise nature of its imprisonment is unclear, but it is imprisoned somehow, and wants out.