Valkenhayn Hellsing

The eternally loyal servant of Rachel Alucard.

He is one of the Six Heroes who fought against the Black Beast during the Dark War and a former Immortal Breaker, having worked with Relius Clover in his youth. After being saved by Clavis Alucard, Valkenhayn swore his loyalty to the Alucard Clan, keeping his oath for over a century.

(Source: BlazBlue Fandom)