The dog with no name owned by Souichiro. After her husband's death, Kyoko
named the dog Souichiro as a memory of her husband. So instead of
straight-out calling him "Souichiro", she called him "Souichiro-san". After finding out about the real Souichiro, Godai often saw the dog as the
personification of Souichiro Otonashi. Thus just like Kyoko, he often
talked to him as Kyoko's late husband, scorned him, and even fought with
him. Souichiro was also used as Mitaka-repellent in some occasions.