Yang Hai (楊 海, Japanese: Yan Hai, Chinese Hanyu Pinyin: Yáng Hǎi) - Yang is a top Chinese professional Go player who hosts Isumi at his apartment. Yang can speak many languages, including Chinese, Japanese, Korean, and English.
He has a rather spiky, black hair.
Yang Hai is shown be friendly person and also like to learn languages and can speak Japanese, Korean and English. He has also shown himself to like using under-handed as shown where he purposely told Isumi to go ten minute ahead of schedule between a match with Isumi and Le Ping to throw Le Ping off in order to ensure Isumi's victory. However, that didn't work so well, because Isumi didn't like it and Yang Hai ended up upsetting Isumi.However Yang Hai is in fact very mature-minded and extremely keen on Go psychology and Help Isumi to learn how to control his emotion so he can play at his best.
It unknown how strong Yang Hai is but considering he is 8 Dan He must be a Strong Player