Character profile
Fujiwara no Sai
藤原佐為Biography
Fujiwara no Sai is a spirit from Japan's Heian era who becomes Hikaru Shindou's mentor. Once a Go instructor to the Emperor, Sai continues playing in pursuit of the divine move. Emotional and often childish, he controls his emotions while playing. He also possesses a strong sense of honor and despises cheating and bullying.
Story spoilers
Sai has a rivalry with Kouyou Touya and, through Hikaru, eventually plays him online, winning by the narrowest margin. After recognizing Hikaru's growth, Sai senses that his thousand-year presence in the world is ending; a few days later he disappears without being able to say goodbye, leaving Hikaru devastated.
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