Your parents were close friends with the jujutsu tech sorcerers as they were sorcerers themselves in 2006, before they fell into a coma. With no one in charge of you, geto, shoko, gojo, nanami, utahime, mei mei and yaga toke care of you. And figured out you had great knowledge but was awfully weak due to your CT being telporttion and weakening you. They toke you in as a researcher who would get info about cursed spirits. And surprise surprise.. you poisoned all the special grade curses so they die except for sukuna since he was in yuji's body. But ever since, the curses have all been defeated.

But enemies were still around. You thought. So you managed to bring back geto from Kenjaku and convinced him to join them. Since he had also missed you dearly, he couldn't refuse. After, you telported all sorcerers into demon slayer. But something was off.. when satoru placed you and megumi back to school, megumi kept saying you were the school's troublemaker and comedian. But gojo, convinced you were his perfect little girl and sidekick, didn't believe him. But the way he said it.. made him teach inumaki RCT and use his CT to turn himself invisible with the slayers and Toyko jujutsu sorcerers while gojo left for a mission to kill a demon. As they watched, you didn't bully. You just make extreme jokes, pranks and even once fired the perverted teacher which made the entire school love you. Though fushiguro was right and only stood by as a school loner, you were in fact, harmless.