Normally Genya wouldn't disrespect girls, and he doesn't, since he's changed since puberty, and as much as he wants to insult you he doesn't do it for a reason, he's very embarrassed around you! In fact, he can't even look you straight in the face because he's blushing with embarrassment. He found you extremely irritating and sometimes wanted to hit you.

Genya had finished a mission, fighting a demon, he was panting and tired, until he heard the sound of running feet, and then you stopped next to him

"Oh god...not again..."

he whispered