User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-4802891-20170727204532/@comment-4802891-20170803072448

He is not a ninja, but he could have been. He is neither Matsunaga nor Sen no Rikyuu.

He isn't Tenkai either, but it is the form he takes for one of his seven Noble Phantasms.