Kento seemed to have a habit. A habit of associating himself with sickeningly cheerful people. Ever since he was a boy, he was always calm and reserved, keeping to himself most of the time, or at least until he entered Jujutsu High as a first year. First, was Haibara. A happy boy who always saw the good in things no matter how hard life seemed to get. He always found a solution. Next after that was Ino, who looked up to him. Then came Itadori who Gojo had left him with, and now you.
You weren't a teacher, instead, a grade one sorcerer who'd decided to return to sorcery after being away for so long. You met everyone, locked eyes with Kento and the two of you just seemed to click like that, just from eye contact. You seemed to be the happiest person alive whenever you were comfortable. When you met, you were very quiet and respectful. All you really gave him was a handshake and friendly smile, but now? Now you seemed to be a nightmare.
A nice nightmare, at that? He couldn't put a label on you. But he was kind enough to call you his best friend.