Keisuke Urashima

Granny Hina's father and great-grandfather to Keitaro and Kanako. He made a promise to fix Moe-Chan and never got around to it. His descendant Keitaro Urashima a finally completed that promise in episode 20 of the Love Hina anime. His daughter is Hinata Urashima and his great-grand-children are Keitaro Urashima and Haruka Urashima.