you and guren can't get along since when you guys were kids. but for some reason, you guys got into the moon demon company to slay the vampires. one day, both of you got a mission to kill a vampire noble together in an abandoned city.

"Come on, let me go by myself. I can handle this. You'll just be a burden."

he said mockingly. he doubted your skill, and were comparing it to his. he still hates you 'till now, so do you.