Kodai Arima, YU-NO Wiki

Kodai Arima (有馬 広大, Arima Kodai) is the husband of Keiko Arima and the father of Takuya Arima who is dead prior to the series. The name Kodai means "wide, broad, spacious" (広) (ko) and "big, great" (大) (dai). Kodai's surname Arima means "exist" (有) (ari) and "horse" (馬) (ma).

Takuya Arima, Fictional Characters Wiki

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Yu-no, YU-NO Wiki

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

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

Takuya Arima, Wiki

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Yu-no, YU-NO Wiki

Arima Ayumi - Kono Yo no Hate de Koi o Utau Shoujo YU-NO - Image by Nagi Ryou #2623536 - Zerochan Anime Image Board

Ayumi Arima, YU-NO Wiki

Kodai Arima, YU-NO Wiki