セイジュ

Leni’s brother and oppposite, he is a seemingly kind young man who appears to honestly care for Ashe, speaking kindly to her and frequently complimenting her. However, like his sibling, he treats Ashe as little more than a pet simply for his own amusement, telling her that if she wants to return to the demon world with him, then she must use her body to convince him.

From Ero+Dere