Akuyaku Reijou Level 99: Watashi wa UraBoss desu ga Maou de wa arimasen

I reincarnated into the "Villainess Eumiella" from an RPG Otome game. In the main story, Eumielle'as merely a side character, but after the ending, she reenters the story as the Hidden Boss, a character on par to the Heroes with her high stats!!...