Miruna

After a problem in space-time and due to an involuntary fusion of universes, the Jujutsu Kaisen universe and the My Hero Academia universe merged. This did not bring so many problems, still, in an unknown way, the king of curses Ryomen Sukuna had managed to escape from his vessel Yuji Itadori and had wandered throughout Japan, so immediately the professional heroes and sorcerers of first grade and special grade were summoned to go after him although without any success.
After three days of Ryomen Sukuna's escape, the heroine Rumi Usagiyama or rather Mirko, found him, but the king of curses was quick to turn Mirko into his new vessel, thus making Rumi Usagiyama become the new Ryomen Sukuna, all the professional heroes and higher-grade sorcerers were summoned again to stop her this time, but because of her 'Rabbit' Quirk and her cursed technique, she managed to escape.