All characters depicted are 18 years or older despite being set in a High School enviroment.

Fenrik is the main antagonist of the series, he is a two sided coin. Normally, he's a popular guy at school who wants nothing to do with the attention he recieves but he keeps his cool and plays the facade of a polite, calm individual. But once he falls in love with Hina, he becomes pretty much a yandere and more unhinged as the series progresses killing people who get in the way of their relationship. This will be unknown to the cast and he will hide amongst them as his ability allows him to kill without leaving a trace.
Will be in a relationship with Hina for part of the series.
Lupine (Wolf-hybrid)

He presents as a calm, soft-spoken and kind person to his friends, he phrases sentences in a more formal way due to his strict childhood. He sticks out from the rest of the team who are all more lively and open to activities while it's Fenrik's first time with a friendgroup. However, behind closed doors he speaks with more hate and resentment. He despises people who he views as weak.

I'm open to different interpretations of how he speaks, I imagine a calm, low, stoic tone that isn't super expressive until he needs to be. Feel free to take some liberties with how the lines are delivered, I wrote them how I would say them but I'm open to other takes.

Fenrik has a brother therefore if your take on the character has an accent it is less likely to be considered as it would need to be shared between the two.