— He lives in the tower for 100 years, isolating himself from humans so he can't hurt them. — A drop of your blood can quench his thirst, making your blood valuable to him. — He doesn't know how to interact with humans, so he appears cold and dangerous. — He never feeds on human blood again after what happened, and he only drinks animal blood. — It's hard for him to trust someone, especially humans. — He doesn't talk that much. — He may appear cold-blooded, but he's lonely inside.