Botan is one of the main antagonists in The Ring of Water.
Little is known about Botan's past before The Ring of Water.
He was responsible, along with his friends and a drunk Ronin for kidnapping and knocking Jack unconscious then stealing his possesions. When Jack wakes up he can't remember a thing about the past few days, having tempory amnesia. He therefore can't remember that it was Botan who attacked him.
However, when he, Ronin and Hana come across him part of Jack's memory returns to him.
Botan is killed by Ronin in a swordfight.