Based on her Definitive Edition design which is slightly different than the original game. I'm using screenshots from the game and while the style is more anime than before it's technically still 3D which Illustrious may struggle, but feel free to experiment with your preferred model and settings.

For the style these gave me closest result (still not flat enough but close)

3d, anime shading

For face and hair

medium hair, light blonde hair, olive green eyes

For the outfit

combat jacket, combat shirt, combat pants, combat boots

The shirt sometimes become all black instead of proper black and white, so maybe add "white" to the shirt