Angelfeather's Flame

"A cat with the fur as white as the moon will harness the embers of the sun, leaving the heaven in chaos and destruction."
That was the prophecy received the day Angelkit became 3 moons old, and AngelClan was left in chaos. A queen had her kits shortly after, dying. The final surviving kit was named Hopekit. Angelkit, seeing the way she was treated, befriended her. She made a promise to never leave Hopekit's side, they would face whatever Hopekit was given together.

(The characters and plot is mine, the rest of everything in here is Erin Hunter's.)