Luna Trieste

Luna Trieste (ルナ・トリエステ) is an associate of Touya and the owner of a gollem called Fanatic Viola. She is also known as The Frenzied Mistress (狂乱の淑女).

Appearance
She wore frilly purple clothing with a bit of a gothic aesthetic. She also wore a short skirt. She also carried a purple umbrella. Her aesthetic was similar to Leen’s, but a lot less prim and proper. She also wore slim-framed glasses, but the deep purple eyes behind them looked almost lifeless .Her long, amethyst hair spilled down far past her shoulders. She resembled a doll in some ways. And then, as she stepped fully into the light, it became clear that both her skin and clothing were adorned with patches of fresh blood.

Personality
Luna is a crazy girl who enjoys killing and tormenting people and also likes the pain she receives from people who want to kill/hurt her. She became like that because of her gollem which takes her sanity to empower her up. She likes to do those stuff because if she did that she feels like an alive person.

It's implied that her personality was once different before she met Viola; the golem is known to drain the owner's sanity in exchange for regeneration. When Touya visits her in jail, Luna barely explains in a lucid manner that she doesn't blame Viola and that Nina had warned her to end the contract several times; before it was too late.

Because of that, Touya cast a curse on her. Instead of killing or hurting someone, she will feel pleasure when someone thanked her. However, it has to be genuine or she will barely feel a thing.

Trivia

 * Touya gets her employed at the Brunhild school, where she begins to recover some sanity; thanks to helping children.
 * The curse Touya put on her can over-stimulate Luna is too many people thank her at the same time.