List of hero skills in Dragon Quest IX
From Dragon Quest Wiki
Hero Skills The hero receives the "Egg On" skill after a scene at Quester's Rest from Patty and will learn the spell Zoom after returning to the Celestrian Observatory aboard the Starlight Express. Egg On is the only hero-specific skill in the game.
Egg On
Cost: 0 MP
Use up a turn to increase an ally's tension by a level.