Blue and Red are the best huntsmen in the world... But which world actually?May be they have other names, but these are code names. Nicknames...

Name: Fenris

Nickname: Red/The Fury

Age: ???

Race: hybrid (half-vampire, half-werewolf)

Status: alive

Weapon: blade/sword

Eyes: blue/amber

Hair: red

&

Name: Vincent

Nickname: Blue/The Black Cat

Age: ???

Race: vampire

Status: alive

Weapon: twin-guns

Eyes: blue/red

Hair: black