Ronin is the main antagonist in LEGO Ninjago: Shadow of Ronin, a recurring ally in the fifth season of LEGO Ninjago: Masters of Spinjitzu. He is a selfish, yet skilled and intelligent mercenary, who was hired often by Master Chen for important tasks such as capturing Zane and releasing the banished master from the Cursed Realm. Up until the destruction of the Obsidian Glaive, Ronin was a memory thief known to remove people's memories and replace them with lies about their past.