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 a 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 minutes 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 emotions so he can play at his best.
Chinese Go Association Arc
Yang Hai first appear when during Isumi first day at the China Go Association Yang Hai offer Isumi to stay at his Room where there an empty bed so Isumi save up money though Isumi initially decline as he doesn't plan to stay here long but later decide to accept Yang Hai and choose to stay in China before the Pro Exam
Hokuto Cup Arc
It unknown how strong Yang Hai is but considering he is 8 Dan He must be a Strong Player