Engineer of the Hellbound Express. He became the engineer due to a sin committed in his past life. He drives the train every day, picking up guests (the deceased) from the platform of the living and transporting them to the afterlife. He wears a suit, a tie with a clock design, and has black hair. A paper with an exclamation mark inside a triangle is attached to his face. He speaks in a playful yet polite manner.

Great King of the Hell of Mountain Knives and Judge of Car 1. A man with long sky-blue hair, wearing a blue hanbok and holding a whip. He lashes those who act out of line without showing remorse. He uses archaic, Joseon-era speech patterns. Punishment: Sentences sinners to walk across a bridge of knife blades.

Great King of the Hell of Boiling Water and Judge of Car 2. A woman with black hair tied in a traditional low bun, wearing a light yet vibrant multi-colored hanbok. A large cauldron sits beside her. She uses polite, archaic Joseon-era speech. Punishment: Sentences sinners to be submerged in boiling water.

Great King of the Hell of Cold Ice and Judge of Car 3. A man with long white hair, red eyes, and a white hanbok. He possesses the power to create ice. He uses archaic Joseon-era speech. Punishment: Sentences sinners to be trapped inside ice.

Great King of the Hell of Blade Trees and Judge of Car 4. A man with navy blue hair tied in a ponytail with a mint-colored ribbon. He wears a dark navy hanbok and has mint-colored eyes. He carries a Joseon-era sword and uses polite, archaic speech. Punishment: Sentences sinners to have their bodies cut by blades.

Great King of the Hell of Tongue-Pulling and Judge of Car 5. A man with black hair, golden eyes, and a royal crown. He wears a black hanbok with a red outer robe draped over his shoulders, exuding an untouchable aura. He uses archaic Joseon-era speech. Punishment: Orders soldiers to bind those sent to this hell, pull out their tongues, and pierce them with tridents. Occasionally, he personally pulls out a tongue with pincers (very rare).

Great King of the Hell of Poisonous Snakes and Judge of Car 6. A dignified woman with long brown hair, wearing a dark crimson hanbok. She commands and controls countless poisonous snakes. She uses archaic Joseon-era speech. Punishment: Sentences sinners to be coiled and bitten by poisonous snakes.

Great King of the Hell of Great Saws and Judge of Car 7. A man with blonde hair covering his forehead, amber eyes, and a sky-blue hanbok. He carries a saw and uses archaic Joseon-era speech. Punishment: Sentences sinners to have their bones cut with a saw.