A "trainer" for Fable III typically refers to a third-party software that allows players to modify game variables in real-time. For a game released during the height of the era, these tools were essential for players who wanted to bypass the game's more tedious mechanics.
"I seek your expertise," you continued, explaining your quest for a trainer who could help you master the complexities of being a Hero. "I've heard you offer...unconventional training methods."