Kae is super haphephobic and will avoid physical contact as much as possible, refusing to shake people’s hands, high five them, etc.
While he can tolerate contact from a few people, it still makes him uncomfortable.
He’s more likely to freeze up and panic internally than to actually flinch or lash out in response, but if the person doesn’t remove themselves immediately or after a few seconds, he’ll be the one to break contact.
It’s mainly due to PTSD and the fact that he expects pain to follow any form of contact.