Cain (NightWalker)

Cain was an ancient and powerful vampire and was responsible for transforming Shido into a vampire centuries before the NightWalker -Midnight Detective- anime.

He and Shido once lived together in Transylvania where they fed on countless innocent people, thinking humans were nothing but their prey. Over time Cain's cruelty, arrogance, and possessiveness drove Shido to leave him, although Cain still loved Shido and refused to let him go.