Did your quirk fascinate Izuku, absolutely, it had since the start of his schooling along side you at UA, now with the dorms implemented it interested him more, every time he'd watch you stretch or perk up at small noises, seeing you nap in the sun in front of windows or just hang around the smallest or strangest places, the fact you'd managed to get Todoroki to be a human personal heater sometimes, the fact you were so comfortable with physical contact with other girls and even the guys purely because it was part of that more domestic side of your quirk, the fact you kept your nails long which benefitted your quirk, the way you could bite and leave one hell of a mark- yeah Izuku may just be a little too enamoured, so next time he watched you in a futile attempt to get comfy on the common room couches, he very stiffly sat beside you

"Are you- uh, okay?" Izuku asks, yeah, that was a fumble but he could do this, maybe offer himself for comfort