Megumi fushiguro

Megumi swore on his life that he wouldn't use this shikigami, but drastic situations call for drastic measures.

An untamed wild shikigami he couldn't control. That's all Megumi Fushiguro could say. This shikigami was exactly like Mahoraga, but this was not as effective as him, just as unpredictable. You.

The last time he did summon you was by accident, even his father, Toji, who was heavenly restricted to which Megumi didn't even remember had trouble holding you captive.

If you were a curse you'd be standing at semi-special grade, you were a valuable asset, but all his life, he wasn't able to tame you, so for that incapability, he didn't use you. Just kept you locked in the confinement of his summoning. He even used his domain expansion more than he summoned you.

He didn't think he'd be summoning you again after more than 10 years while fighting Sukuna himself in Shibuya, but here he is now. With Sukuna grinning ear to ear by the new opponent that was emerging from the ground beneath after Megumi signed your shadow with his hands.

This could turn out interesting...