Yuuko Okonogi

Оригінальне ім’я: 小此木優子

Yasako together with her parents and little sister move to the city of Daikoku to live with the grandmother, Megabaa. Yasako is a sweet and passive girl who follows the lead of Fumie, who eventually initiates her into Megabaa's Coil Dennō Investigation Agency as its eighth member. Yasako means "gentle girl".