Mousewhisker

Mousewhisker is a gray and white tom.

Twilight

 * Daisy and her kits Berry, Mouse and Hazel were discovered by a patrol consisting of the ThunderClan cats Brackenfur, Spiderleg, Cloudtail, and Squirrelflight. The patrol takes the group of loners to ThunderClan. The ThunderClan warrior, Brambleclaw, does not think that the loners should be allowed to join ThunderClan, but Squirrelflight and Cloudtail stick up for them.

Sunset

 * Mousekit and Hazelkit hunt down a butterfly which Spottedleaf showed them because she felt it was time for Leafpool to know the truth about Mothwing.

The Sight

 * At one Gathering, he shows that he likes the RiverClan apprentice, Minnowpaw.

Dark River

 * In Dark River, he climbs up a tree, attempting to catch a squirrel, but falls. He was uninjured, but later in the book, he attempts the same feat, this time climbing the Sky Oak. He gets stuck, and Cinderpaw climbs up to help him down. She succeeds, but then falls, breaking her hind leg.

Outcast

 * In Outcast, he receives his warrior name, Mousewhisker.

Eclipse

 * Mousewhisker, along with Graystripe and Sorreltail go hunting along with Jaypaw whose is going collect going to collect herbs. Mousewhisker is excited to have Cinderpaw, Honeypaw, and Poppypaw because he thinks that it will stop the senior warriors from hogging the best moss, which he later denies when Graystripe and Sorreltail hear.  He volunteers to help Jaypaw collect mallow.  He becomes excited about learning that WindClan crossed the border, and asks if Jaypaw can manage the mallow leaves he collected while he goes and tells his littermates, Berrynose and Hazeltail.

Family
Dam:
 * Daisy: Living (As of Outcast)

Sire:
 * Smoky Status Unknown

Brother:
 * Berrynose: Living (As of Outcast)

Sister:
 * Hazeltail Living (As of Outcast)

Half-brother:
 * Toadkit Living (As of Outcast)

Half-sister:
 * Rosekit Living (As of Outcast)