Lewis Mueller appears as a supporting character in the Singapore Sky arc. A former fighter pilot who served in the same war as Abigail Jones, he later became an aerial stunt pilot renowned in Sam Ibrahim's Pathfinder Air Race circuit.

During his racing career, organizers cast him as a surly antagonist who consistently lost to rival Clark Ibrahim. This manufactured villainy masked his private generosity—he donated all race earnings to humanitarian causes despite his brash public clashes with Clark. His life fractured when Sam Ibrahim sabotaged his plane mid-race, triggering an explosion and crash.

The accident inflicted severe injuries, scarring much of his left side and causing permanent paralysis that confined him to a wheelchair. He married Isabelle Mueller, who steadfastly supported his recovery.

Years later, Abigail Jones uncovered his potential involvement in the 2003 Baghdad bombing raids that killed her parents, fueling her vengeful intentions. His exact role remains unverified.

Resilient through trauma, Mueller stays connected to racing via his wife. His experience with Sam's betrayal later fuels Laurent's team in orchestrating a plot to expose Sam's corruption and achieve justice.