User blog comment:Hitsuji Mamoru/Servant Creation Room 2 : Guess of the Who/@comment-4802891-20170310114853/@comment-30314236-20170310163441

Mmmm... Edo period, Artistic Aesthetic, youkai related... I'm a bit lost with Idleness thing and his NP, though...

Okay, I will say he is Toriyama Sekien, a ukiyo-e artist, so his youkai are made of ink or something similar.