Ronin

Ronin is a selfish yet skilled and intelligent thief and bounty hunter. Based in Stiix with his airship R.E.X., Ronin left a bad impression on the Ninja during their first encounter, as he hoped to keep the Scroll of Airjitzu for himself. Yet, when Morro obtained it, the Ninja were purged into a quest to learn Airjitzu and find the Tomb of the First Spinjitzu Master. Looking to change his ways, Ronin sided with the Ninja, and oversaw Nya as she tried to master her water element.

When the Ninja gained the upper hand and retrieved the Sword of Sanctuary, Morro forced Ronin to steal it, threatening to have him banished to the Cursed Realm if he didn't. Fearful of his own demise, Ronin stole the sword and gave it to Morro, who used Ronin to trick the Ninja into heading to the Caves of Despair, where they almost died. To compensate for this, Ronin gave the Ninja R.E.X. so that they could find the Tomb, and they succeeded in doing so. Despite their success, Morro and the ghosts occupied Stiix. In an effort to give the Ninja a fighting chance, Ronin intervened and tried to subdue Morro, but failed to prevent the arrival of The Preeminent. Alongside Wu and Misako, Ronin helped fight The Preeminent and eventually boarded a steamboat that left Stiix with its citizens, shortly before Nya drowned the colossal creature.

After the Battle of Stiix, the Police Commissioner hired Ronin to capture the Ninja due to crimes they committed, though they were actually framed. Ronin managed to do so, although his actions would eventually make the conflict with the Sky Pirates worse. After most of the Ninja were trapped in the Sword of Souls, Jay created a rag-tag team to raid New Djinjago, with Ronin being a member. The team entered the floating city, which began collapsing after Nadakhan was weakened. Due to Jay's final wish, recent events were undone and Ronin never captured the Ninja to begin with. On the Day of the Departed, Ronin realized everyone was out celebrating the holiday, leading him to steal scrapmetal from Ed and Edna's junkyard and build a mech. While there, Ronin used the mech to help Jay win his fight against a resurrected Samukai.