Susanoo Ôtsutsuki = Otaku who reincarnated in Potterverse with a System.Orphelin who decided to take back his name in the wizarding world.
Severus Snape = Potions Professor at Hogwarts, He is a stern man most of the time who gives Gryffindors misery, but gives a different treatment to Susanoo because he is his godchild, the son of his friends and a pupil with a lot of potential in the field of potions and occlumency.
Hermione Granger = First love of the protagonist in his first life.First girlfriend of Susanoo Ôtsutsuki, He is very attractive and overprotective of her.