I'm stealing this as my own headcanon for Nurse, btw.Munchenhausen wrote:He was called out to a vehicular collision one drizzly evening, and tasked himself with calming down and treating the driver of one of the cars. He wound up making a deal with the casualty, promising to look after their daughter if he weren't to make it.
He's been looking out for Emi ever since.
I think consciously pairing Hisao and Kenji is a good idea. I mean sure Kenji is a bit dangerous for Hisao, but what doesn't kill you makes you stronger right?
I don't think Kenji knows about Hisao's condition canonically, but I'm going with FelOnyx here and saying that, one way or another, he knows.