Brick

Brick is a ginger she-cat with a patch of fur missing on her back.

The Rise of Scourge

 * Brick was a friend of Bone, as well as supporter of Scourge, then named Tiny, even before BloodClan was officially formed. Brick asked Tiny to come fight one of the dogs in the Twolegplace that was keeping them from a dumpster full of food. Doubting Tiny's claim that he could fight dogs, she told him that if he could not, he had best be well away from the Twolegplace by dawn. After Tiny proves himself and is renamed Scourge, Brick respects him and serves as one of his right paw cats through the book, witnessing his killing of a rogue cat, and also making sure that Ruby and Socks, Scourge's siblings, get out of BloodClan territory.

Chat With Erin Hunter
In a recent chat with Vicky Holmes, it was revealed that Brick is indeed female to clear up confusion, and that she had deserted BloodClan prior to The Darkest Hour, as she did not want anymore blood on her paws.