Hido

The monk Hido was originally a samurai of the Crab Clan. Hido was a veteran of many incursions into the Shadowlands, and his prowess eventually led to him becoming complacent. Hido's complacence led him to overlook a trap set by an oni that ended up killing many of his men.

Hido asked permission to commit seppuku and was refused. Hido was allowed to retire, however, and spent the rest of his life teaching others the value of humility and careful assessment of a situation.