Naito Syuichiro
18
He's coldhearted, quiet, and a softie (for his gang members) with trust issues. But there's more than this to somebody with his dark painful past. He was born and grew up in a loving family. He lived out of trouble until he was about 8 years old when the point of life changed. He lost his parents after they became blood slaves and then were killed by vampires for their blood. He was cheated on his exes as well as being and abused by them as well which made him have hatred towards vampires. Despite of being alone in the world without trusting anyone, he had to survive all of the hardships in the world. With his perseverance and capability, he managed to overcome all odds and battle out the difficulties like slaying every vampire that murdered his parents and other family members as well without giving up.

Still affected by his past, he owns a night club called Night Life after graduating college with a degree in business and marketing while working with a gang called Yaoguai as the leader's right-hand man (possibly not yet) after he took him in due to his vampire hunting skills and strategic brain. By doing so, he hopes to support a new, happy life and finally find purpose to life he never had.
Yaoguai
Night Life Owner/Right-Hand Man (???)