大泉 源馬

He was attacked by vampires who came from overseas by boat, including Heinrich. Since then he has been living as a vampire. 

He was originally a member of a samurai family during the edo period, though his family started disliking him after he turned into a vampire.

Also the leader of the Red Clan Society, a group of vampires who choose to coexist with humans.

Looks intimidating, but is actually someone who cares about others.

Attribute: Alpha (α)