Thunderstar

Thunderstar was the founding leader of ThunderClan.

In Snatched

 * Thunderstar is announced to be the founder of ThunderClan along with Windstar, Shadowstar, Riverstar, and Skystar with their respective Clans. Thunderstar found out Windstar's plans on siding with ShadowClan for aid along with attacking for land. He came to the RiverClan's leader for help, with Riverstar accepting his offer. A deadly war broke out between the opposing Clans and the end of the war resulted in ThunderClan losing to ShadowClan and WindClan for their now burnt and destroyed territory.