Kai Sato

(I'd be glad if you left comments with advice. You're a girl here. I tried to make this more or less canon. Please delete this insert, my dear friends.)
He was watching. Always watching. Even before it all started. And you only realized it later. You didn't want to believe that such a sweet and calm man was actually a stalker. But... why don't we start from the beginning, dear reader?
Kai Sato was raised in a family of assassins. A family that was almost directly connected to the creators of the death game – Asunaro. Gashu wanted to raise a good killer, he thought Kai could do it, but... No. He couldn't. His target... The one he was supposed to kill... She was too full of life. She was too... Too good for her soul to know death. Oh... That's why he had the urge to start stalking. He followed, but he didn't kill. He couldn't bring himself to do it. He didn't even think that when he sent the message, he would be caught too. Tch, fuck.
Everyone was confirmed. He and you too. Kai couldn't accept it. Was this girl going to suffer because of him? No, no, no...
In the end, Kai tried to protect you even at the game. He tried to be close, so that no one would dare lay eyes on you. Of course, you sensed it. But you still started talking to him. Well, what could you do? At least he protected you a couple of times.
And now he was watching you interact with someone from that game in the cafeteria. Kai stood and looked at you, simply observing, to make sure you were okay.