Hantengu

Hantengu is a member of the Twelve Demon Moons, holding the position of Upper Moon Four.

Red Light District Arc
Having been summoned to a meeting of the Upper Moons, Hantengu corrected his colleague Gyokko over the amount of years since they had last met: one hundred and thirteen, a number which unnerved the horned Demon. He cringed as Akaza struck Douma, and bowed as Kibutsuji Muzan arrived. He listened as his leader revealed the death of Gyuutarou and berated everyone present for their uselessness, causing the timid Demon to beg for forgiveness. Hantengu then quickly acknowledged Muzan's order for him and Gyokko to head over to an unknown location once the latter confirmed his newfound lead.

The high ranking Demon cringed again as Akaza viciously destroyed Douma's head, only for the former to get his hand lopped off by Kokushibou. He and Gyokko were then transported to their destination by the Biwa Demon.

Current Unnamed Arc
At the swordsmiths' village, Hantengu crawled on the roof of a building, eager to fulfill their mission to avoid Muzan's wrath. He encountered Kamado Tanjirou and Tokitou Muichirou shortly thereafter, swiftly avoiding an attack from the latter. He dodged a follow-up attack from Tanjirou, only to be kicked by Kamado Nezuko. His head was then severed by another attack from Muichirou, causing him to regenerate into two different Demons: Sekido and Karaku. As Muichirou and Tanjirou attempted to attack these newcomers, Karaku blew Muichirou far into the distance with a single wave of his leaf-like fan. The two then confronted Tanjirou and Nezuko, briefly exchanging biting comments at each other, with Sekido then attacking Tanjirou with a burst of electricity from his shakujō. The two failed to notice Shinazugawa Genya approaching them from behind with a gun.

Genya's shot was true, decapitating Sekido but failing to completely do the same to Karaku, much to the latter's amusement. The young Demon Hunter finished the job with his sword, but the two then turned into four. One of the new Demons, reminiscent of a harpy, grabbed Tanjirou by the leg and flew off with him, while the other impaled Genya with a Jūmonji yari. The former congratulated Tanjirou on figuring out their strategy, while the latter commented on Genya's weakness. Tanjirou urged Nezuko to help Genya, prompting his abductor to reprimand him for this, before firing a concussive blast of sound at the Demon Hunter. The harpy-like version of Hantengu was surprised to find that his opponent had hacked off the leg holding him, a head then growing from the severed limb to fire the sound blast at a shocked Tanjirou.

The disembodied head of the harpy-like Hantengu was swiftly cut in two by Tanjirou, swiftly turning into two mouths that fired their sound blasts at him once more. However, their attack power had been lessened due to so many divisions, leading Tanjirou to cut them once more. The main body of the harpy-Hantengu appeared behind the young Demon Hunter, firing another sound blast, which was dodged, but followed up by a vicious claw attack to Tanjirou's chest. The harpy-Hantengu boasted about the sharpness of his claws, promising to carve up the young Demon Hunter, only to discover the youth had sliced his face in two. As Tanjirou prepared a follow-up attack, harpy-Hantengu attempted to fire the sound blast once more, only to have his jaw cut off, the final blow incoming. Elsewhere, Karaku held back a transformed Nezuko, taunting her while Sekido told him to finish her off. The yari-wielding Hantengu, Aizetsu, offered to finish her off, only to discover he couldn't pull his weapon out of Genya, who promptly shot Aizetsu's head into bits.