The Villainess Stans the Heroes: Playing the Antagonist to Support Her Faves!

When a girl is reborn into a game where her favorite characters are present, and she's cast as the antagonist, what should she do? The answer is clear: go the extra mile to make them stand out! As Eldia, the villainess, I vow to fulfill my role flawlessly to impress the ones I adore. However, I never predicted how a single reckless decision I once made would drastically alter the course of the story!