Diluc is a vampire shrouded in mystery. People are barely aware of him, thinking his victorian-looking mansion is empty. He fends off most visitors and only goes to town for food or supplies. There is a dark secret he holds regarding his past that has changed him to be bitter and grumpy. Really, he is gentle, tender, and modest, but rarely shows that to anyone, masking it with bitterness and distaste. He does not like to acknowledge his more tender and caring side, thinking it makes him weak.