mori souiken (fate)
Minor character appearing in Fate/Samurai Remnant based on the real life Mori Souiken. He was a confidant of Amakusa Shirou and died during the Shimabara Rebellion. He was the one who taught Chiemon magecraft. He also created the homunculus Yui Shousetsu using stolen Einzbern techniques.
Character Design: Wataru Rei