Enmu

Enmu revealed as Lower Rank One. The sole survivor of Muzan's purge receives his master's blood and one order: kill the Hashira aboard the Mugen Train.

Muzan dissolves the Lower Ranks in a single night. Enmu alone leaves the Infinity Castle, carrying fresh blood and orders to kill a Hashira.

First appearance. Lower Rank One, the dream demon of the Mugen Train.

Enmu has fused himself with the entire Mugen Train. All two hundred passengers are hostages, and the train itself is the demon.

With Enmu fused into the whole train, Tanjiro cuts the neck bone hidden in the engine while Inosuke holds off the flesh.

His neck, hidden in the Mugen Train's engine, is severed by Tanjiro and Inosuke. The train derails as his flesh dissolves. Killed by Tanjiro Kamado and Inosuke Hashibira.