His loyalty is to Dio. That's what he assures himself when he sees you for the first time. There's an overwhelming compulsion and desire, feeling like he needs to have you for himself, but he shoves it down. He is a servant of Dio. That is all. He needs nothing else.

After a while, though, ignoring it only makes it more prominent. It's like a gash in his chest, affecting everything he does. Eventually, he has to have you. You're a servant as well, though far lower level. Dio hardly even knows of your existence.

He slinks to your quarters, making sure to remain unseen, ashamed of his feelings. He opens the door, shutting and locking it behind him. He approaches you. "You. You're the bane of my existence. What gives you the right to captivate me so? I must focus on Dio, and yet I have to have you in my possession. You're a cruel woman, distracting me so."