Lacus Welt

Birthday: August 21
Height: 175 cm (5'9")
Race: Vampire; Human (formerly)
Blood type: AB

Like all Vampires he sees Humans as mere livestock and laughed at the Humans who thought that the Vampires came to protect saying that one don't protect livestock and own it instead.
What is known about Lacus is that in his human life he had siblings, and in 2012, he killed Yoichi Saotome's sister, Tomoe Saotome, when he drank too much of her blood.

(Source: Seraph of the End Wikia)