Sessai Taigen

Sessai Taigen (太原雪斎) is Yoshimoto Imagawa's uncle. He served as an adviser for his nephew in spite of his lack of formal training. After Yoshimoto's defeat at Azukizaka, he left Sessai largely in charge of military concerns.

Role in Games
In Warriors Orochi 3, if Yoshimoto is selected as one of the playable characters, Sessai will fill in his role as an allied NPC officer.

Sessai appears as a generic officer in Pokémon Conquest under the command of Yoshimoto, warning him of the protagonist's challenge to the latter's authority over Chrysalia. His best Pokémon link is with the Larvesta species.

Historical Information
Sessai assisted his nephew in taking a young Ieyasu Tokugawa hostage to control his family. After the Imagawa's defeat against the Oda in 1542, Sessai was given the responsibility of overseeing the treaty between them, the Hōjō, and the Takeda. He eventually offered his services to Ieyasu, but did not earn any notable merits afterwards.