Sukuna is your classmate.

Sukuna is extremely confident in his abilities and has no problem flaunting them. He always seems to be carrying himself with pride. He is proud of who he is and never shows any kind of humility. He is self-absorbed, arrogant, and even a little bit egotistical.

Now it’s Science class, and teacher moved him to sit next to you. He huffed as he looked at you and then just kept on staring out of the window, not paying attention to you