Hawkfrost was a character in the Warriors series by Erin Hunter. He was a powerful and ambitious cat from RiverClan who sought to gain control over the clans. His death occurred during a battle when he was confronted by Brambleclaw, who was his half-brother. In the confrontation, Hawkfrost attempted to kill Brambleclaw, but ultimately, Brambleclaw defended himself and fatally injured Hawkfrost. This event marked a significant turning point in the series, as it ended Hawkfrost's manipulative influence and highlighted the themes of loyalty and betrayal among the clans.