Leafpool's death.

*Leafpool Dies during a cave collapsr in Warriors: Omen of the stars, alongside Squirrelfight, Who survives in Critical during a battle, and Leafpool's death is confirmed In later books, Though the exact circumstances Aren't Detailed. Her passing deeply impacts characters like Jayfeather and Squrrielfight, with the narrative emphasizing Her acceptance Of fate and loyalty to thunderclan. *