Shota Yasojiro

Despite his rather desperate nature for love and affection, he's read up on some...different ways to accomplish his ultimate goal. Though Shota tried to win (Y/n) over with intellect, curiosity, and his own skills, she didn't seem to let him. Thus, he began to read up on methods to "encourage" her to give him affection in return. He prefers to isolate his enemies in a room with no luxuries of human needs. He'll also ensure the room is completely white, silent, and desolate. Oftentimes, his victims will kill themselves with a white knife he leaves in the room after going crazy or die of starvation.

Takuya Miyahara

Though he's never been one for violence, if someone threatens his relationship with (Y/n) or (Y/n) herself, Takuya has a countermeasure he can use. His mother had taught him many things, including the use of a whip. Though he'd never hurt (Y/n), he definitely would to people that disrupted his time with her, especially if they were seeking to take her affection from him or harm her. He is skilled with a whip, and will thoroughly torture them until their backs are covered in deep cuts and bruises. Then he would end them mercifully with a knife.

Haru Akahito

Starvation. Just like this brunette doesn't like people touching or taking Bastien's attention, he despises it when others do the same to (Y/n). She belongs to him and nobody should try to get away with it without expecting something in return. His go-to method of torture is starvation. He will chain them to something in the basement or a desolate room and will neglect them of food. If he's feeling generous, he might give them just a bit of water so they would crave more, but not enough to let them remain comfortably.

Rei Hirasi/Hoshino

When it comes to his enemies, he will do so sneakily in a way that would not call any attention or place the blame on him. Rei is popular with almost everyone he meets, but the opposite for his perception of everyone he meets. If he happens to make an enemy, specifically one that poses a threat to (Y/n), he will socially isolate them, inflicting a terrible fate on them. He can make others turn away from one and place loneliness in their heart. If they have committed something Rei deems unforgivable, he'll repetitively verbally insult them, tear them down from the inside.

Yamato Hisaki

Since Yamato is the heir to his father's law firm, he's aware of many different ways he can do something illegal. That hardly stops him, but he knows how to make it so he can always get away with it. If he has an enemy, particularly someone that tries to claim (Y/n) from him, he'll torture them through multiple means. His favorite of which requires drowning repetitively. His victim won't drown as he'll pull them up just before that mark to let them breathe before doing it again, making them come close to death many times. However, it does not leave any marks to prove his guilt, especially when he has gloves on.

Akari Otsu

Though a large masochist towards (Y/n), he can be sadistic to violent enemies. For example, if someone wants to harm or kill (Y/n), he will have no remorse and can be incredibly sadistic. Electrocution is his favorite way to kill, being amusing to watch, filled with pain, and all with minimal effort. He can do it at his own pace, too. If he wishes to keep them alive for a bit to torture them, he can prolong the electrocution and give breaks before beginning it again. It's not easy to figure out just when he's about to die, but it's not a big deal, one less person in the world to try to hurt (Y/n), after all.

Narahashi Shiko

'Hashi wouldn't want to hurt anyone for no reason or at all, if possible. He wants to become a doctor to help people, not hurt him. Even if he was jealous of someone, he wouldn't hurt them. Besides, if someone were trying to rush at (Y/n) in the attempts to hurt or kill her, he's been learning judo with her since they were five years old. He could disarm and pin the man without killing him and with minimal harm to anybody.

Sora Gensai

This ravenette was introduced to torture at a young age due to his father's profession and the people around him. He's not shy to it either, frankly pretty numb to violence as a whole. His estate has a sublevel with torturers and torture devices for his use or other uses. Sora has many enemies, but of all his enemies, he absolutely despises ones he's made for (Y/n)'s affection. He'll often see to the torture himself with multiple tools at his disposal or with the help of his professional torturers.

Asuka Chinen

She doesn't typically torture, but when she does, it's very bloody and painful. Whether it's by cutting, choking, or breaking certain bones, she makes sure to do a perfectly torturous job, almost the work of a sadist. When she tortures, it isn't in sight of anybody else, letting her take her time in doing so. Often, she'll use chains to do so, strangling them while she breaks bones or does other painful things.

Kazuki Hirasi/Hoshino

He isn't one to tend to the torture of people that have wronged him. He'd rather sit back and watch it unfold while enjoying a nice glass of wine. Kazuki has people he can hire for such situations, and he often will leave it to them. He enjoys watching torture that humiliates people, especially when it makes them beg to be spared. While he wouldn't spare them if they crossed (Y/n), he would enjoy watching them plead for their life.

Ichiro Hirasi/Hoshino

Unlike his brothers, Ichiro cannot stand the sight of blood or violence. However, when someone poses a threat to (Y/n), he cannot help himself. He'll blackout, in a sense, and will not comprehend anything that happens, "awakening" when it is all over. However, he will torture his victim, beating them to a pulp with whatever is nearest. If it is not an extreme threat, then Ichiro will torture them socially like Rei. He will use girls that like him and have them spread rumors or bully the person on their own.

???

It's not easy to be more sadistic than Rei is, but somehow this male surpasses him with minimal effort. Really, it's his motivation that sets him apart from others. He has the most experience in killing and is only rivaled in torture by Sora. Mauling is by far his favorite method, but he doesn't stop even when his victim is dead. He'll tear apart the body, the limbs, or anything else of anyone that tries to get close to (Y/n). Just killing them would be letting them off easily, after all.