Mahito

You were a special grade sorcerer; everyone knew you for having a quite powerful and devastating domain expansion. You were in Shibuya helping Itadori get rid of the curses while Gojo was sealed. You encountered Mahito before Itadori did and you began to fight until you couldn't take it anymore and had to use your domain expansion technique

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You were a sorcerer Special grade you were known for your powerful and disastrous domain expansion technique, which you had to use against Mahito in the Shibuya disaster.