Enma is one of the 21 Great Grade swords, currently in the possession of Roronoa Zoro as one of his three blades.
Shimotsuki Kozaburo in the Wano Country. Until 20 years ago, Enma was wielded by Kozuki Oden alongside his other sword, Ame no Habakiri. In Oden's hands, both blades became the only weapons known to ever (until the present day) injure Kaidou. After Oden's death, Enma was inherited by his daughter, Kozuki Hiyori, who would later gift the sword to Zoro in exchange for the latter allowing Shusui, a national treasure, to remain in Wano.
On the cover of Volume 96, Enma is seen to be a moderately curved Shobu Zukuri-style katana with a lilac and gold color scheme. Like the Ame no Habakiri, the tsuba is trefoil-shaped, and each lobe is holed in the middle and thickly ridged. The tsuka is lacquered solid lilac (rather than cloth-wrapped), as is the saya. Both are embellished with simple, golden, five-petaled flower motifs on each side. The kashira and kojiri are matching in appearance, being large with trefoil cutouts to match the tsuba; the kojiri possesses an additional accent, which seems to be a wide, knobbed ring above it. Like the Kitetsu swords, Enma also possesses an irregular flame-shaped hamon and black no-hi.
Three pieces of cord are present on the sword: one directly above the kashira (without hanging end), another on the saya a short bit below its mouth with two hanging, tufted ends (serving as the sageo), and yet another cord further below on the saya (again no hanging end). Further, a little bandaging is present on the tsuka for better grip.

In its initial depictions, in the A-ra-shi: Reborn video, its tsuka is black, and its hamon is golden. As seen in the opening "DREAMIN' ON", Enma's anime color scheme is a violet tsuka, as well as a violet sheath.