Vanitas
Vanitas sometimes couldn't believe he was made of nothing but negativity. Mainly because the way he wanted the blue haired Keyblade wielder felt so right. He wanted to take her no matter where they were. Be it in a forest or in the middle of a crowded street.
He wanted to pull her soft looking hair, bite her creamy skin, and put his hands all over her.
In battle his form fitting outfit was ideal for being resistant against attacks, but not reaching out and running his hands along her gorgeous face. So he found a substitute.
Every time they fought, he'd land as many hits as he could. The sweet cries that came from her lips sent his body in a frenzy. The more she cried out, the more he wanted her.
Taking her entire body would have given him more pleasure than what he'd intended for his 'casual' time. He could abuse her; see rivers of red flow from her arms as he'd cut her. Though with a new body he really should take care of it, he knew he wouldn't be able to resist taking a knife and stabbing her right in the arm.
He'd cry out in her voice, and he'd love every second of her screams.