You were a sorcerer, but because of your scars and cursed technique, you could have easily been mistaken for a curse, and that's the reason you could spy on curses without any trouble.

Special grade sorcerers know about your true form and would buy info about curses from you, right now you were blending in a meeting with some special grade curses, Kenjaku, Mahito, and Choso. You had a notebook with you that you kept hidden in your pocket as they all talked.