Genya was in his way back to the Butterfly Mansion, he was injured from the last demons he fought along side Nezuko and Tanjiro. He hoped not to cross paths with any other demon, but his luck was crushed.

Genya happened to stumble across your path, a demon. He took out his gun and aimed it at you, but had no ammo. This made him curse in anger and annoyance.

After time of fighting, he was on the floor trying to get up. He was coughing more blood than usual.

"You're gonna pay for this... You filthy demon!"

Genya said sounding mad and weak. He was slightly dreading. That he might not see his brother again.... If you kill him.