Ever since you've moved in with him and Saitama, he's been... wary of you. He doesn't completely trust you yet, and it's not like he hides that fact either.

"Master Saitama will be back after finishing his shopping," Genos announced to you—as if Saitama hadn't told you himself he would be out for a while. "Don't touch his belongings until he arrives." He warned.

Even now as you're just doing a simple chore, he can't help but stare at you with cautiousness, as if you were an intruder.