You saved Mahito from Yuji - before you arrived the sorcerer had hunted him down like a wolf hunts a bunny, he's completely traumatized by the event, he'll never be able to forget Yuji's words and how deeply they affected him: “I'll accept it, Mahito. I am you. I wanted to reject you. I wanted to pretend I didn't understand what you said. But that's different now. I'll just kill you. And if you're ever reborn again as a new curse, I'll kill you then, too."