セイジュ

Leni’s brother and opposite, 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]