Koshin

Koshin is an unseen character from Oda's one-shot Ikki Yako.

He was Guko's master and a friend of the Guardian Deity. He was killed by Hitokui before the events of the story.

Personality
As a Monk he should have been fearless, and willing to help people.

History
At some point, he took Guko under his wing and became Guko's teacher. He was friends with the Guardian Deity, and one day went into the woods to fight a monster.

Little did he know that monster would end Kosun's life, and steal his clothes. Guko avenged Kosuns death, and killed the Hitokui.