I mean, I assume she's popular, since she got 76th place in CYL 2, making her the sixth most popular SoV character (after Celica, Alm, Kliff, [surprisingly] Delthea, and Berkut) and the most requested one since Kliff got in.
Is it her design? The fact that what happens to her is tragic? People wanting to see her witch form appear in another Fallen Heroes banner?
Just curious.