Recurring Sodor engines, vehicles, and railway leaders who support the island's transport, construction, and rescue efforts.
A strict professional hierarchy where Hatt disciplines and ultimately rewards Thomas based on his actions.
A friendly competitive rivalry that sets off the plot's initial concerns.
A casual friendship marked by playful teasing and accidental consequences.
A temporary professional substitution where Ryan fills Thomas's operational role.
A standard employer-worker dynamic where Marion's discovery is managed by Hatt.
Related entry on Wikidata (Q6146073), public domain (CC0).