One of Keitaro Urashima’s promise girls, Mizuho is a Tokyo University student that only appears in the two Dreamcast games: Love Hina: Totsuzen no Engeji Happening and Love Hina: Smile Again. Employed by Hina Urashima to tutor Keitaro, she promised that, should Keitaro fail his entrance exam, she would take responsibility and take him as her husband.