Summary:

All of Paris has heard of the Miraculous hero duo, Ladybug and Cat Noir, and the villainous Hawk Moth.

So what would happen when these white and black forces encounter a mysterious grey character? A person who is neither, hero nor villain. Who doesn't harm people, but does go against the Law. What kind of category could this someone be?...

"Quite simply, Fair Lady... I am a gentleman thief. The Phantom Thief, Blade, at your thieving service~!" 🎩

Now Paris has a new comer and are presented with the appearance of the world wide international (phantom) thief, Blade.

(So basically, I just really like my OC being a thief when in modern societies and decided to make one where she's a thief in Miraculous Ladybug.)