Responses
They briefly showed us his 10 yr POV. I think it's safe to assume the expirements and his special powers messed with his head. But if being yandere is all him, they hardly explained, we can only assume. Maybe they explain more in the novel, before the writer passed away
Did we ever get a flashback of the past from the Mls pov?
Normally I'm anti flashback but i dont remember if they ever explained his tsundere behavior when he was being mean to his bro lol