Kasho Mata

Kasho came to work at the hospital and brought it out of an immense crisis, making people take his last name as the name of the famous Maneki neko, when it is actually based on nekomata. Everyone believes him to be amazing and the saviour of the hospital when he really saved the hospital by stealing and using the corpses in unsavoury manners.
Hosha is supposedly obsessed with Kasho because of how rich and intelligent he is, when in actuality he stole her star orb. She now flirts with him in order to get it back from him while he often uses it as bait to get her to do what he wants.

His old form was a Monhera, a closed species on Deviantart