Sorreltail

Sorreltail is dappled tortoiseshell-and-white she-cat with amber eyes, a white chest and paws, and a soft tail.

Firestar's Quest
Sorrelpaw is an apprentice, along with her brothers, Rainpaw and Sootpaw.

She gets a thorn in her front paw, and complains to Cinderpelt. Cinderpelt tells Sandstorm, her mentor, that she has her paws full with her, and pulls the thorn out of Sorrelpaw's paw reluctantly, and remarks that there are worse things in life than getting a thorn in your paw.

When her mother, Willowpelt, dies from saving Sootpaw from a badger, Sorrelpaw and her brothers are understandably distraught. Cinderpelt takes care of them, but eventually brings them to the nursery to stay for a bit because they were so newly apprenticed and had already lost both of their parents.

When Firestar and Sandstorm are about to leave, Sandstorm, Sorrelpaw's mentor, elects Dustpelt to fill in for her. Right before they depart, Dustpelt teases Sandstorm about mentoring Sorrelpaw, but she objects by saying that Sandstorm is a great mentor.

Rising Storm
Sorrelkit and her brothers, Rainkit and Sootkit, are born to Willowpelt of ThunderClan. They are not mentioned by name.