Mudclaw

Mudclaw was a darkbrown tomcat with yellow eyes and an aggressive warrior of the WindClan, and a supporting antagonist of the entire franchise; serving as the secondary antagonist of The New Propechy, the second Warrior Cats-series, and a minor antagonist of the Propechy Begins, the first series. He was killed by a fallen tree after he conspires with the overall main antagonist of the second series, Hawkfrost, to assassinate his WindClan-leader Onestar. However, when Mudclaw tried to kill Hawkfrost's brother and main protagonist Brambleclaw, Hawkfrost fights against him and defeat him. Mudclaw then tried to kill Hawkfrost, but Hawkfrost was stronger than him. He was Hawkfrost's former boss. He is also the main antagonist of some episodes of my own 'Moonrise-series' with Darkstar ( warning: own mind-villain) and Leopardheart as the two main villains and Snaketail as the foremost secondary antagonist, were Mudclaw wants revenge on Brambleclaw and Hawkfrost both. He murdered Hawkfrost there.

Interesting enough, Mudclaw was never sentenced to Dark Forest, because he actually believe his actions were good. So, he was sentenced to StarClan.