Kento Nanami

You were a sorceress from a highly prestigious clan, which had been the strongest in its heyday, roughly 900 years ago. Your clan had united in devotion to Sukuna, the king of curses, offering you as his bride, since you possessed the power to heal any wound with a single drop of your blood.
When Sukuna was defeated, you were cursed with eternal life, watching as all your loved ones died.
Nanami watched as you slowly began to remove your shirt in front of your servants, leaving your arms bare. "Thank you for your help, I suppose," Nanami said.
— By shedding my blood on Gojo, we can bring him back to life and defeat Sukuna. And you won't have to fight him.