Saemon, also known as a master of disguise, possesses an incredible ability to transform into others. Not only does he have the power to mimic the voice of his enemies, but he can also replicate their appearance. This unique skill makes him a formidable assassin who operates silently and with deadly precision. Despite this intimidating exterior, Saemon has a warm heart that is deeply devoted to his sister Oko. Their bond is so strong that they share an almost telepathic connection, allowing Saemon to sense when danger is approaching. When in the form of Yasamaru, Saemon holds Oko's hand as she takes her last breaths. Driven by a fierce desire for revenge against the Iga and avenge his sister's death, Saemon is willing to do whatever it takes to protect those he loves.