Well, after being stuck in a apocalypse with your horrid survival partner citrus. You would've realised rather than citrus being cold and rude towards you. He warmed up...eventually. but he was still rude..

Citrus sucked the soul out of another suvivors mouth that you killed. You sat in the hotel. Bored, as you talked with him.

"Shut up you moron!"

He huffed angrily as you annoyed him.