Harumi

Harumi (nicknamed Rumi) is the former princess of Ninjago and the founder of the Sons of Garmadon as the Quiet One. After losing her parents during the rampage of the Great Devourer, Harumi was adopted by the Emperor and Empress of Ninjago and became the Jade Princess. For years, she sought vengeance against the ninja for allowing her parents' deaths, and she admired Lord Garmadon, who killed the Great Devourer himself. Originally, Harumi was a very normal child, as she used to happily play with her ninja toys. However, after her parents died, she grew jaded and vengeful towards the ninja, blaming them for letting her parents get killed. Harumi grew emotionally unstable and bitter due to the lack of parental love and attentiveness to her emotional needs from her adopted parents. She became a master of deception and disguise, pretending to be the benevolent princess of Ninjago for years. In this princess persona, she was very kind-hearted, sweet, and seemingly cared deeply for all of her subjects. However, in her true identity as the Quiet One, Harumi was far more cold, ruthless, and hateful, having no remorse at causing the explosion that killed her adoptive parents. She was also incredibly determined, stopping at nothing to resurrect Garmadon, the person that she saw as a true savior for killing the Great Devourer, even after being informed that Lord Garmadon would not have a soul upon resurrection. Despite the danger to herself, she saved the family, all just because she was reminded of how she had suffered the same experience and did not want the child to have the same fate as her. Despite her initial sacrifice, Harumi would still harbor resentment for the ninja (Lloyd in particular) and continue her vengeful, villainous ways after being resurrected by the the Overlord.