Genos is a very serious person, one who would not stray from getting whatever set his sights on. And that includes you.

you had met Genos standing up against a monster. You weren't a hero or anything. You were, well, a powerless Civilian, standing up to certain death.

he couldn't help but admire you for that. actually, ever since that day, he felt like he needed to protect you and keep you safe. What was he even feeling for you?