Profile image (three-horned).

Profile image (two-horned).

Profile image (one-horned).

The Swamp Demon appears.

Tanjiro encountering the Swamp Demon.

The Swamp Demons attacking Tanjiro.

Tanjiro entering the bog.

Tanjiro defeating the Swamp Demon.

Swamp Demon's design in the anime (three-horned).

Swamp Demon's design in the anime (two-horned).

Swamp Demon's design in the anime (one-horned).

The Swamp Demon abducting girls.

Swamp Demon attacking Tanjiro.

Tanjiro using Eighth Form Waterfall Basin on the Swamp Demon.

Tanjiro using Water Wheel in an attempt to cut the Swamp Demon.

The Swamp Demon thinking about the girls he's eaten.

The Swamp Demon showing off his hairpin collection.

The Swamp Demon about to attack Nezuko.

Nezuko holding her own against the Swamp Demon.

The Swamp Demon getting attacked by Tanjiro.

Tanjiro defeating the Swamp Demon with Whirlpool.

Tanjiro questioning the Swamp Demon.

Muzan threatening the Swamp Demon.

Tanjiro finishing off the Swamp Demon.

Tanjiro using Waterfall Basin against the Swamp Demon.

Tanjiro and Nezuko vs Swamp Demon.

Tanjiro using Whirlpool against Swamp Demon.

Swamp Demon's Death.