headcannon: whenever Zero Two is just sitting on the couch, Hiro just comes by and puts his head on hers like he’s a cat, and he does this for no other reason than to get a smile out of her… and he like to act tol.

Zero Two is already a very physically affectionate person, so I don’t think it’s a stretch to say that Klaxo Hiro would be the same. They’re just…very touchy-feely people, which can get a little exhausting for their friends, and then it’s a trait that gets passed down to their children.