"I wasn't born a ShadowClan cat, but I'm very glad I'm here now. I like being ferocious and I like hunting in the dark. You won't find me lolling about in the sun like those RiverClan cats or crashing through the forest making as much noise as a ThunderClan cat."—Tawnypelt in Secrets of the Clans, page 61
Tawnykit and Bramblekit were born in ThunderClan. Their mother was Goldenflower and their father was Tigerclaw. When they were a few days old, Silverstream's kits, Featherkit and Stormkit, were taken to Goldenflower and she took care of them until Graystripe decided to temporarily live in RiverClan so that the two Clans would not fight over the half-Clan kits.
Bramblekit and Tawnykit were still kits when Tigerclaw was exiled from the Clan and became a rogue. They knew nothing of their father until Fireheart had to tell them so that they would know who their father was. Then a fire broke out in the forest and Bramblekit got left behind in the burning camp.
Fireheart went back to save Patchpelt, Yellowfang and him, but Bramblekit was the only one of the three that survived the tragedy. Patchpelt was buried on RiverClan territory, where ThunderClan sheltered for the night.
Tawnypaw became an apprentice and her mentor was Brackenfur. Bramblepaw's mentor became Fireheart. She started to notice how the other cats would react to her and her brother. She didn't like it and didn't know why.
One day, Darkstripe took Tawnypaw and Bramblepaw to meet their father, who was already the leader of ShadowClan. Fireheart found them and he had to tell them about their evil father's action. Bramblepaw was terrified but it became too much for Tawnypaw to bare.
She heard Smallear; an elder, say that she was going to be as treacherous her father, so she chose to leave her birth Clan to be in the only place she felt wanted, ShadowClan. Where she could be with her father.
Tawnypaw could not take anymore of the Clan and their erresonable disliking of her and her brother. So she finally left and joined ShadowClan, knowing that Tigerstar would accept her. Tawnypaw was excepted to be in the Clan since she was Tigerstar's daughter.
Her mentor became Oakfur. She wouldn't rejoin ThunderClan, even though she now saw her father's evilness. She helped to fight against BloodClan, but still wouldn't rejoin ThunderClan.
Tawnypelt became a warrior of ShadowClan. She still visited Brambleclaw at Gatherings, but she missed him very much. She was chosen by StarClan to go on a quest to find the sun-drown place along with Brambleclaw, Feathertail and Crowpaw, although Stormfur and Squirrelpaw insisted on coming along.
During the long journey, she became very close to the other questing cats. They returned with shocking news: The Clans would have to leave the forest forever.
ThunderClan, RiverClan, ShadowClan, and WindClan came to a new home by a lake, the Moonstone replaced by Moonpool. Once the journey was over, she got her first apprentice: Starlingpaw.