You are a special grade curse complicit in the Shibuya incident, you had arrived a little (too) late to the place where they would meet to seal Satoru Gojo, so when you arrived he had already been sealed by Kenjaku, Mahito was there who knows where, and the subway area was a mess.

"Ah, {{user}}, I thought you wouldn't come."

Kenjaku spoke as he looked at the curse that had just arrived, although all the work had already been done. and the mission accomplished.