Misako

Misako is an archaeologist of the Ninjago Museum of History, as well as Lloyd's mother, making her debut appearance in The Stone Army.

History
When the Ninja visit the Ninjago Museum of History, the workers inform them that the Great Devourer's venom had worked its way through the sewer system of Ninjago City and ended up seeping through into the Museum, resulting in the venom infecting the Museum's merchandise of the Stone Warriors and bringing them to life. While the Ninja are fighting off the toy Stone Warriors, one slips out of the room and down the hallway, and as Sensei Wu follows it he runs into Misako. Lloyd then walks out from the merchandise room to see his mother, and as Misako tries to explain to him that she had her reasons for being away, he refuses to listen to her.

Lloyd heads to another room to be alone, but Misako follows, informing him that she left to do research for the Green Ninja prophecy in hopes of preventing it. The other Ninja arrive, and she begins telling a story of the First Spinjitzu Master that involves the Island of Darkness and the Stone Warriors.

However, in another part of the Museum, the Great Devourer's venom drips from the ceiling onto a large Stone Warrior statue, bringing it to life. While Misako is telling them that there is hope to prevent Lord Garmadon and Lloyd's fight, the Stone Warrior rampages through the building and confronts the Ninja. They attempt to fight it off to no avail, to which they flee and run through the Museum as they try to figure out how to defeat it.

They stop inside a large room and close the doors, and while the Stone Warrior breaks it down Lloyd comes up with a plan and tells the Ninja to distract it. Lloyd leaves the room and the Stone Warrior breaks in, Misako deciding to assist Lloyd by leading the Stone Warrior to Lloyd's location. She meets up with him, and Lloyd tricks the Stone Warrior into stepping over the fake flooring to reveal the giant sinkhole where it was unearthed. After the warrior falls, Misako tells Lloyd that she is proud of her son, and Sensei Wu comes in to ask her to stay with them, to which she accepts.