A sprite edit of Cometto-san based in her Magical Chaser: Stardust of Dreams:
As for fanfics, what if Cometto-san meets/befriends Yuu Morisawa from Mahou No Tenshi Creamy Mami? If you watched Creamy Mami, then the idea would be really crazy.
This is a mugen project of Cometto-san based in Magical Chaser (in a very early stage):
a) Here Cometto-san kicks (a sprite edit since she was not a kicking character in game) her Magical Heroines Plus counterpart:
B) Cometto-san's unfinished strong punch:
c) New win pose with her star power dress:
d) Her stand with alternative colors:
