Motonobu Matsudaira (松平 元信, Matsudaira Motonobu) was a feudal lord of Mikawa and the former school president and former Eternal Student Council President of the now-defunct Mikawa Academy. He is the father of Horizon Ariadust, who was killed in an accident in 1638.

He is known for his implementation of an isolation policy to Mikawa in 1638 and, most recently, as the creator of the Mortal Sin Armaments. Refers to himself as “Sensei” and speaks as if he were lecturing.


  • Motonobu is based on Tokugawa Ieyasu, who adopted the name Motonobu Jirosaburo Matsudaira when he was 15 years old (according to East Asian age reckoning). The real-life Motonobu also had Tadatsugu Sakai and Tadakatsu Honda as his most loyal generals during the Sengoku Period.


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