Wise martial arts master and grandfather to the three ninja brothers.
Wise grandfather and martial arts mentor to the eldest brother.
Wise grandfather and martial arts mentor to the middle brother.
Wise grandfather and martial arts mentor to the youngest brother.
Grandpa supports Charlie's legal battle against Jack's toxic waste operation.
Villain who directly confronts and attacks Grandpa and the ninjas.
Explore the full interactive character relationship map of 3 Ninjas Knuckle Up