User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-27971189-20170512073224/@comment-4802891-20170516133339

Hmmm... a legendary, folklore character with magic powers, a lot of knowledge and a thing for music. And he is a killer of men... Mmm...

Not sure. I will have to make some more research.