Keiko Arima, YU-NO Wiki

Keiko Arima (有馬 恵子, Arima Keiko) is the wife of Kodai Arima and the biological mother of Takuya Arima. The name Keiko means "favor, benefit" (恵) (kei) and "child" (子) (ko). Keiko's surname Arima means "exist" (有) (ari) and "horse" (馬) (ma). Keiko makes only one in person appearance in the series outside of the final episode. She briefly appears when Takuya is trapped in the cave together with Mio.

Takuya Arima, YU-NO Wiki

Arima Keiko - Character (56131) - AniDB

Saka no Ue no Kumo (TV series) - Wikiwand

Keiko Arima Voice - YU-NO: A Girl Who Chants Love at the Bound of

Keiko Arima, YU-NO Wiki

Yu-no, YU-NO Wiki

YU NO: A Girl Who Chants Love at the Bound of this World

Takuya Arima, Heroes Wiki

Takuya Arima, YU-NO Wiki

Time Traveler's Diary

Takuya Arima, Fictional Characters Wiki