Master of Louis XVII

The unnamed man is the Master of Avenger Louis XVII "After" the Holy Grail War in Fate/Requiem. He’s a person from the old generation of humanity before everyone was born with a Holy Grail within them, Louis' Master was a deeply disturbed individual with severe mental problems. He worked out of a small workshop in Akihabara and attended group therapy sessions where he became aquainted with Erice Utsumi.