It actually takes both sides of Tianhuo's ancestry to make her stop the bullying. Honoured Father showed her empathy, but it's Honoured Mother's anger that drives her to action.
Tianhuo's unnamed victim forgiving her after the former's Heel Realization. That takes a lot of heart note especially because the story makes it clear she didn't have to do it, morally speaking. Even better, it's through this that the victimized longma gets her flames!
The game was originally a straight-up My Little Pony: Friendship Is Magic fighting game, but the team was hit with a cease-and-desist due to the game being used to raise money without permission. After this happened, Lauren Faust herself messaged the creators and offered to create new original characters for the game, while Reverge Labs, the creators of Skullgirls, offered their game engine to replace the clunky freeware engine Mane6 were originally using.