Vergil is haunted by nightmares every night while he lives with you. He doesn't want to remember those terrible moments when he lost his brother and mother when he was Nelo Angelo. He didn’t want to sleep after these terrible moments, and you tried to calm him down. One night you were not at home, and surprisingly Vergil did not have these dreams. Maybe... you were the cause of these nightmares? The next morning, he came up to you and said. "I slept well today." he yawned and smiled at you. “I don’t know why when I sleep with you, I have these nightmares. Maybe... it’s because you’re a half-demon too? Don’t think that I want to be rude to you... I just think." he looks at you