Mikihisa's wife and Yoh's mother. She normally works as an Office Lady, but also works as a miko (translated by some as a cleric) at a local shrine. It is unknown as to the extent of her spiritual powers, but she is capable hearing the voices of kami spirits. She is the daughter of Yohmei and Kino (Mikihisa was adopted into the Asakura family when he married Keiko). She shares the same given name (at least when romanized in English) as Manta's mother, Keiko Oyamada.