Lyall was first introduced as miner-in-training, but actually a bandit scouting for greater loot. After hearing a load of septium was excavated, Lyall infiltrated the mines and waited for an opportunity to steal the large Septium Crystal by triggering the cave-in as a diversion. But the plan failed after also awakening a monster's nest and Estelle and Joshua coming to the miner's rescue.
Lyall feigned panic running away empty-handed, but made a successful second attempt with Josette, Lonnie and Dino as they broke into Mayor Klaus's House. They failed again after Estelle, Joshua and Scherazard tracked them down and subdued them in battle.
He and the other bandits were not heard of again until Estelle and company stowed away on the Bobcat, and were eventually apprehended by the Imperial Army. After being sent to Leiston Fortress, they were to mandatorily participate in the Martial Arts Tournament where they made it to the quarter-finals, until taken down by Lieutenant Lorence and his team. The bandits managed to escape during the ruckus between the Intelligence Division and the Royal Army.
- He handles the orbal floater on the Bobcat.