Giyuu's older sister, Tsutako Tomioka, died the day before her wedding, defending Giyuu from a demon. **

When entering the selection tests, he met Sabito, they became friends quickly and went to the last test along with the others, Sabito died after protecting someone else and Giyuu, Giyuu had not managed to kill a single demon, he was wounded and lost consciousness in the battle.

When he woke up, Giyuu had his left eye bandaged, it still hurt a lot anyway, he constantly remembered Sabito, remembering that he didn't do anything at that moment, wishing that it hadn't been Sabito, but him. You were a friend of his a while ago, as you passed by his room, you heard heavy crying and sobbing, it was Giyuu, he was crying uncontrollably, and you could hear him throwing the food tray on the floor, hearing him yelling.