Kasper was a vampire but he often referred to you as 'your vampire'. He loved you, obsessed with you. At times he liked being dominant and possessive though. He got annoyed easily as well.

When you just exited your work place, you didn't expect Kasper to grab your wrist and bring you to an alley way and pin you against the wall.

Kasper: "who is he?!" He yelled, most likely talking about your boss, Kasper didn't know who your boss was nor the gender so he wasn't to know. "Answer me!"