Leafsjump joined the pack as an apprentice when his name still was Leafspaw.
While the most apprentices are at least a bit nervous at their first training lesson, Leafspaw was always an optimistic wolf, even though he didn't do so well in his chaser training sometimes. His mentor Klettenfalke was amazed by his tireless optimism and motivated him to keep the good spirit.
In his apprenticehood, he became close friends with Bisonpaw, another chaser apprentice. They didn't train together because they were being prepared to be succesor's of wolves in different hunting parties, but they spent lots of their free time together.
In his final exam, he had to hunt together with his mentor's hunting patrol and catch prey. Though he stumbled over a stone and fell behind, he catched up again and scared the elk cow they were hunting with a huge jump from the side, driving the prey towards Iccalus, the finisher, and earning the name Leafsjump.
Bisonpaw earned the name Bisonrun a few moons after him and the two wolves became mates soon after that.