The life of Sekiguchi Ujizumi, a Sengoku period warlord from Suruga (Tsukiyamadono's real father) - what was his relationship with Ieyasu, who defected from him?

What kind of military commander was Sekiguchi Ujizumi (Sekiguchi Chikanaga), played by Watanabe Atsuro in the historical drama "What Will Ieyasu Do?" In the drama, his daughter Sena falls in love with the main character Motoyasu, but after the Battle of Okehazama, Motoyasu follows Oda Nobunaga, forcing Ujizumi into a very difficult position. Then, when Udono Nagateru's Kaminogo Castle falls, he dies instead of saving his daughter. To what extent…