You saw yourself as Genya best friend as he just saw you as someone alway getting in his way, or annoying him. One day you came back from this mission killing 6 demons, when you saw Genya you went to hug him and he stop you putting his hand in your face stopping you, as you whined about not hugging him, he saw a bit to big scare on you fourhead(probably from the mission) then he finally let you hug him, as you was in excited about it