Sleekwhisker/Main article

Sleekwhisker is a sleek, golden-yellow she-cat with green eyes.

She is introduced as Sleekpaw, a young apprentice of ShadowClan under the mentorship of her uncle Tigerheart. She has two brothers, Juniperpaw and Strikepaw, and her parents are Dawnpelt and Crowfrost. She has little regard for Clan life, and when her friend Needlepaw sparks a rebellion against Rowanstar, Sleekpaw happily joins her. She, Juniperpaw, Needlepaw, and Violetkit join Darktail's group. Sleekpaw also gives herself her own warrior name, Sleekwhisker. She becomes much more malicious and selfish, going so far as to taunt her own mother over the death of Crowfrost, and showing no remorse when her grandfather and former Clan leader, Rowanstar is driven out with Tawnypelt and Tigerheart.

Sleekwhisker remains faithfully loyal to Darktail, doing everything he says and informing him of cats that have their loyalty to the Kin questioned. She tells him of Violetpaw's meddling with the fresh-kill pile, whose intentions were to drug him and help the prisoners escape. When Darktail drowns Needletail as a punishment for Violetpaw, Sleekwhisker helps him do so. She is driven out along with remnants of the Kin such as Yarrowleaf and Spikefur, but returns to Clan territory and while initially driven out of SkyClan by Leafstar, she is eventually accepted and briefly becomes a SkyClan apprentice. However, Sleekwhisker lies to her Clan and both of her brothers about wanting to redeem herself and kidnaps Yarrowleaf's kits, Flaxkit and Hopkit. She ambushes Tawnypelt with the help of Nettle, Raven, Jacques and Susan, intent on getting "revenge" on Rowanclaw because she claims his weak leadership is what made her life "miserable". In the following battle, she viciously attacks Rowanclaw with Nettle, but Rowanclaw kills Nettle and forces Sleekwhisker to retreat with Raven. Sleekwhisker and Raven flee from the scene as Rowanclaw and Nettle die, leaving Sleekwhisker's status unknown.