Su Nightingale, who travels through the world of Conan, travels as a black organization codenamed "Nightingale", bound to the "Guardian at will" system, unlocking top-level combat, firearms and other full-level skills. She is powerful and has no mandatory tasks.
She refuses to join any force and acts as she pleases. She neither relies on the black side nor the red side. The only hidden mechanism is to trigger "absolute defense" against female targets. Starting from the task of Shigehiko Tonguchi at Hotel Aipido, she used her own rules to protect the people she wanted to protect in the confrontation between Conan and the organization and the whirlpool of various cases, writing an undefined legend.
