He is mentioned by Breezepelt, while the young WindClanwarrior is training in the Dark Forest. As Tigerstar, Hawkfrost, Breezepelt, and Brokenstar are discussing training, Breezepelt boldly announces that he can beat two of his Clanmates, Leaftail and Harespring, in battle training. Tigerstar, upon hearing this, replies to Breezepelt that training isn't the same as fighting, and when faced with death, warriors fight harder to defend their lives.
When Dovepaw and Ivypaw are caught by Sedgewhisker in WindClan territory, Leaftail is one of the cats who comes to see what all the commotion is about. Joining his Clanmates, Leaftail, Harespring, and Owlwhisker go and check the perimeter of WindClan's camp, as per the orders of their leader, Onestar.