Killu-Nya~ Meets MHA (HxH X MHA)

Killua had no idea why, but he woke up in an alleyway. For some reason his head and backside hurt like crazy, as he went to rub his head he felt something warm and fluffy on his head. "huh?" Killua's tail flicked. Wait, tail? He looked behind him and sure enough there was a fluffy white cat tail waving in the air behind him. His fingers mapped out the outline of the warm fluffy thing on his head and he figured out it was a cat ear. Killua sat down for a moment, blinking. He was a neko in an unfamiliar alleyway. That was just lovely. Suddenly his ears twitched as he heard someone coming down the alley, "this way, they won't find us here" Killua activated Zetsu and leapt quietly onto the top of the building as a group of five people came down the alley. "I think we lost em' " said one with dark brown hair and what looked like a mask? All of them have masks, none of them can use Nen. He blinked as he noticed that one of them had four arms. Killua squinted at him, he's not a chimera but he doesn't have Nen either, what is he?