Rein Penenberg

Rein Penenberg (リイン・ベンネンバーグ, Riin Bennenbāgu) is an antagonist in Genso Suikogaiden Volume 1. He is a vampire, hundreds of years old, and the former lover and confidant of Sierra Mikain.

Genso Suikogaiden Volume 1
Rein was the first man to be transformed into a vampire by Sierra Mikain following her encounter with the Moon Rune. Rein had been dying from a sword wound, having failed to protect the woman he served, when Sierra saved his life. The two were said to have become lovers following this. Together, they founded the Blue Moon Village where they lived peacefully until Neclord stole the Moon Rune. Rein was one of the many vampires who chose not to die but to feed on humans to sustain himself.

Rein survived until the Dunan Unification War when Nash Rathke and Sierra came across him. He attempted to feed on Sierra but was distracted by Nash, allowing Sierra to destroy him with her Song of Evanescence.