@ilikepi31415 no, it would be a different story if they’re just foreigners. Iirc hakuya used half of his life to save kobeni. If he’s just a human, kobeni would probably be dead.
@Anchira i think you misunderstood the last one, she didn’t just brought him into any house, she brought him to the lumberyard / the one where he took down the last villains. There are some trees around, albeit not shown fully. That place also became his training ground hence her ‘battlefield’.