Its hard to say if he's on the right here. Yes, she has been thru alot herself and needs someone to help her. I would like to think he has an endgame in mind.
Fuyuzora Kogarashi. - Yuuna and the Haunted Hot Springs
Rough childhood, learned and matured and cares about the girls in his life. Is not dense. He vows to protect the women that love him and earned their trust.
Kamijou Touma - A Certain Series
Rough childhood, called God of Pestilence...