The heroine of the story, a orphan who was left on the doorstep of the Sister of Mercy chapel and raised by Sister Catharine. Though she tries to fit in with the other nuns, she feels horribly out of place. That all changes one particular night as she's using the can and gets an unexpected visitor.
Because Destiny Says So: Pretty much tells Claire its an order of God, no point in fighting it. Still she knows the hardships of whats to come down the line and tries her best to give a comforting hand to her.
What the Hell, Hero?: Catherine chews her out for introducing herself to a young Clarie naked. This wouldn't be so bad, except Clarie starts making drawings of her in that form and Catherine is rightly worried that this won't sit well with the other sisters if they see it.
Claire's guardian and maternal figure. She was the one who found Claire and raise her, thus both have a deep attachment to one another even though she's allergic to cats and Claire constantly stays in contact with them. However it seem there are some secrets she been hiding from both Claire and the Sisters of Mercy that have recently been coming to light. Secrets that seem to be connected to Claire.
Does Not Like Shoes: Due to the fact she had to flee the church and couldn't gather any proper clothes leaving her in her tattered habit and barefoot. Grimm most likely probably wouldn't let her wear any.
Fan Nickname: Sister Cat, when she's being possessed by Grimm.
Sanity Slippage: Whatever affecting her is messing with her demeanor and is only getting worse during the travels.
Tsurime: Further emphasizing her relation to cats.
A.K.A Evil Cat. The evil Cheshire looking cat that seems to be stalking Claire. Catharine did a ritual which somehow enables it to posses her body. It wants Claire for some reason, but for what hasn't been revealed yet.
Jerkass: Same as above. Her personality turns a 180 after her energia is unblocked.
Interestingly, the storyline for Sister Claire's past shows that while Marguerite was still not exactly cuddly back then, she did get along pretty well with little Claire. Among other things, she looked after her with some kindness when Catherine was ill, apologized for frightening her when having a panic attack over a fire, and sincerely thanks Claire for bringing her tea.
Playing with Syringes: We see her first interaction with Claire sticking her with needle full of laxitives as punishment for playing with cats
One of the teachers of the covenant. She's the one that trains Claire in the art of Nun-Fu.
Dark and Troubled Past: During her apprentice days, her mentor was killed and eaten by wolf witches after saving her while she looked on helpless to do anything. She vowed from then on to not let something like that happen again.
Heroic RROD: Her Hulking Out power is useful against monsters but, along with affecting her judgement, it puts a toll on her body's muscles including her heart. Meaning she can only use it in short bursts.
He Who Fights Monsters/Knight Templar: Her hatred of witches has some unfortunate layers. Though it's revealed in Missing Moments, she's a transfer from the Helsing group of nuns who're infamous for this behavior.
Hulking Out: Can use a special technique to make her herself much more muscle-y, giving he a power boost.
Well-Intentioned Extremist: She wants to protect people, but is a tad overzealous in trying to fight evil that it often clouds her sense of right and wrong.
Your Days Are Numbered: At some point while tracking Claire's group. She's poisoned which is slowly killing her. It eventually takes it's toll rendering her unable to walk and Marguerite states she only has hours left.
Rosalie and Marie
Two twin sisters who befriend Claire after her first tiff with a Grimm-Possessed Catharine.
Too Dumb to Live: Well not often but they can be rather gung-ho most of the time. When they confront Catharine about her secret she hiding and that she was lying during her witch trial. Catharine asks how they knew this. Rosalie is quick to clam up and drop the issue but Marie blurts out they could tell from her aura, giving the twin's secret power away.
Twin Telepathy: An ability they developed over time. However they prefer to keep it secret as such ability would be considered witchcraft in their covenant.
A seemingly normal bar worker that a few of the tracking Sisters of Mercy encounter. It turns out he's a Wolf Witch.
Berserk Button: Don't touch his dog. Also nuns, especially if they're monster hunters.
Happily Adopted: Played with. His clan was wiped out by Witch Hunters, and he was taken in by another clan. But while the clan leaders see,treat,and love him like their own son, his bullying "sister" Azi makes it her business to make him feel inferior and constantly tell him that they aren't really his family.
Leeroy Jenkins: His over-zealousness revealed that the Wolf Witches clan was still alive to the nuns, which forced his pack to relocate. To add insult to injury, his pack was a peaceful division of Wolf Witches. So he wound up putting his whole family in danger for a petty grudge which the leaders rightly chastise him for.
Jerkass Has a Point: It was Lupo's fault that the clan was forced to relocate due to his need for vengeance. She also chastises him that he should've took into consideration his family as well before doing the act.
Voluntary Shapeshifting : A trait of the wolf witches which allow her to change into a normal and hybrid wolf forms.