Kadar hadn't noticed the shirt, either-- he'd been busy hoping that the girl wasn't dead, and that she'd be all right. He'd had to do more awkward things than ignore a slipped shirt before when people were in danger, so it honestly hadn't occurred to him-- but her embarrassment sparked off his own, and his cheeks flushed red as he averted his gaze, waving his hands a little.

"I-- I am sorry! My name is Kadar-- I was just checking to see if anyone else had arrived and I heard you yelling!" An explanation that really didn't explain much, but would hopefully suffice.