Mori Ranmaru in the Warring States Period.

One of the most important figures in Nobuyuki's later years was the legendary peerless teenager Mori Ranmaru. Mori Ranmaru is the son of Morinobuyuki, who was his trusted retainer in his early years. Mori Yoshiro and his eldest son both died for him when nobuyuki defected to Asai. Nobuyuki was heartbroken, and then he took special care of the orphans of the Sen family. Ranmaru has a reputation as a child prodigy, especially in mathematics and physics.