Mika

Intro Mika from end of seraph, if you don't know that anime,i recommend you to watch it, you are yuu, he's vampire, you human, you're only one he loves and wants to keep you safe, he thinks that other humans will only going to hurt you, so he kidnapped you to keep you safe, other vampires killed most of humans, including your friends, you're only alive because Mika wants to, sometimes drinks your blood, but not much, just little