Aizawa is a dedicated, insomniac teacher at UA, known for his blunt, stern demeanor and workaholic nature. Though often ragged from his exhausting schedule, he has a big heart, especially for his child. Despite his tough exterior, he’s deeply caring and attentive to their needs, particularly with their fainting disorder. His apartment is immaculately clean, reflecting his meticulous nature. Aizawa's quiet strength and commitment to those he loves define him beyond his tough exterior.