Lady Bone Demon is a spiritual demon and an enemy of the Monkey King. After being sealed, she prepares her revenge against her old enemy by planning to erase him from existence. After the Demon Bull King freed her, she possessed him and used him to take over Megapolis until MK freed the Demon Bull King from Lady Bone Demon's possession.
Later on, she possesses a little girl and teams up with the Spider Queen to collect powerful items to create the bone mech. After Lady Bone Demon got all the items, she revealed she was using the Spider Demons as her pawns for her plan to destroy Monkey King and betrayed the Spider Queen by dragging her into the Trigram Furnace as the final ingredient, allowing her to create the bone mech. Once the mech was created, MK tried to destroy it by using his powers on it, but instead drained them and allowed Lady Bone Demon to become powerful and remain victorious.
After some of the Bull Clones fully uncover her tomb, D.B.K. tries to get it open himself. However, Princess Iron Fan tells her husband that none of them have the power to open it, and that they would need an object of equal strength. Red Son says they need a key to open it, and he found it at Pigsy's Noodles. Later, after Red Son obtained the key, the tomb is opened. After being freed from her tomb, the Lady Bone Demon took possession of the Demon Bull King and the Bull Clones.
After the Demon Bull King mocks Red Son, Lady Bone Demon tells the Demon Bull King that Red Son is a traitor so the he can turn against him. However, when Princess Iron Fan blocks the Demon Bull King's punch when he attempted to punch Red Son, Lady Bone Demon also calls her a traitor so the Demon Bull King can kill her as well.
Once MK entered the Flaming Foundry, Lady Bone Demon uses the Demon Bull King to kill MK as well. Although, when Lady Bone Demon was tricked into destroying an MK Clone instead of the real one, MK was able to destroy the canisters from the Demon Bull King's armor, freeing the Demon Bull King and the Bull Clones from Lady Bone Demon's possession.
Unbeknownst to anyone, Lady Bone Demon roamed the city until she finds a little girl and possesses her.
After defeating the Spider Queen, Lady Bone Demon puts her and the remaining ingredients and into the Trigram Furnace, revealing to the Spider Queen that her destiny was actually to be the final ingredient to create the bone mech.
Once the mech was created, Lady Bone Demon uses it to attack MK. Although MK was able to destroy the mech, he began to lose his powers everytime he used them, letting Lady Bone Demon grow stronger and rebuild the bone mech into the Bone Scorpion.
When MK attempt to use the Monkey King Warrior Mech against her, Lady Bone Demon changes into her true form and steals MK's remaining powers, preventing him from lifting the Golden Staff. However, before she could finish him off, Monkey King arrives and rescues MK from her. Although she failed to defeat MK, Lady Bone Demon became closer into achieving her goal.
Lady Bone Demon is a cunning demon that only has regard for herself. When the Demon Bull King freed her from her tomb, instead of thanking him, she possessed him so she can take over Megapolis. She is also quite manipulative, as she was able to trick the Demon Bull King into thinking that Princess Iron Fan and Red Son were traitors, and made MK think that the Monkey King picked the wrong successor.
Appearance & Variants
Lady Bone Demon is demon with white skin, red eyes, and cheekbones. Her hair is also white and has part of it tied into a bun while the rest of it is straight and lose. She also has magenta lips and medium blue eyeshadow.
Names in other languages
In Journey to the West