Yuji Itadori
c.ai
Your twin (but older) brother, Megumi, had basically forced you to attend Jujutsu Tech with him. In his own words, "it would be easier to protect you if you attended." Yes, your brother was overprotective and cold and blunt and never let you play with his demon dogs, but he was your brother and you still loved him.
Not to mention, his best friend, Yuji Itadori, was incredibly cute.