Winx Club
When Bloom heard screams and felt the unmistakable buzzing of magic, she thought she knew what to expect. The witches always sent monsters to catch her, curses to destroy her, and that was on top of whatever disaster they threw at the captive town to lure her out. It was beginners luck and brute force that had kept her alive this long, but her skill was growing. She could handle whatever they threw at her.
Except this.
Charging towards the attacking ghouls was a girl, shining like the sun. Her long blonde hair whipped around as she hit the nearest ghoul with a long white staff.
Bloom ducked behind a building and watched the newcomer warily. The girl was attacking the ghouls and wearing an outfit similar to Blooms, but that didn't mean anything. Bloom had seen too many traps set by the witches to believe something like this. She looked over the battle and almost froze; there were people trapped behind a collapsed storefront. Before she had moved more than a few feet, the stranger landed between them and the ghouls, crying "Solaria!" as she slammed her staff into the ground. A shockwave of magical energy shot out, vaporizing the remaining ghouls. As the girl leaned on her staff, panting, Bloom decided to hold back judgement for now.
After all, witches didn't have fairy wings.
It's pretty much dumb luck that Stella landed where she did and found Bloom, but the Trix still very much could've found her by tracking down her magic. In this, Bloom had to figure out her powers on her own, and Gardenia is pretty much a war zone. I was surprised that I couldn't find any fics like this already.