Jayfeather

Spoiler warning: Plot and/or ending details follow.
Jayfeather is a ThunderClan medicine cat that has served under Firestar's, Bramblestar's, the impostor's, Squirrelflight's, Lionblaze's, and Graystripe's leaderships in the lake territories. He was born as Jaykit, and is one of the children of Brambleclaw and Squirrelflight, alongside his siblings Hollykit and Lionkit. He was apprenticed to Brightheart to train as a warrior, becoming Jaypaw. After discovering an extraordinary ability to connect with other cats' feelings and walk in their dreams, he was urged by Spottedleaf to train as a medicine cat. At first, he refused, but he eventually agreed to train under Leafpool. While walking in the dreams of Firestar, Jaypaw heard about the Kin of Your Kin prophecy, realizing he and his littermates were destined to be powerful.