 He loses his temper with very little prodding (often from Shūei, who constantly eggs him on) and gets tongue-tied speaking in official functions with large crowds.Kōyū is dedicated to serving his foster father, though he often feels that Reishin had only adopted him on whim and he was unworthy of being given the Hong name.In the anime, Reishin is depicted as adopting Kōyū from the streets, apparently impressed by Kōyū's ability to run a lottery with various prizes.