Mistyfeather (or Mistyfall)

Mistyfeather is a sleek, lithe black she-cat with purple eyes and a white paw.

The Befores, Book 1
Mistyfeather is shown teasing Maplepaw (later Mapleshine) about her crouch, making Icefang annoyed and angry. She then leaves, leaving Mistyfeather to find her air element stone. She then finds herself in a thick, dense forest, meeting her brother, Robinfur, after he calls 'Mistyfall'. She then soon learns that in this time period, her father is Whitestar, the Element Tribe leader. She then experiences the ambush on the Death Tribe camp, witnessing her foster brother, Moonwhisper, become an Element cat.

When she soon wakes up, she finds herself in the WindClan Medicine den, Spiritmoon, the medicine cat, knows what happened to her. Icefang and Maplepaw both think she's gone crazy until they both learn that she has an element.