Hantengu takes on the appearance of a short frail man with a very thin and skeletal body, covered with veins and wrinkles and is usually seen crouching. His most noticeable feature is a large bump on the top of his head, accompanied by two curved horns.
His face is thin with a sharp chin and constantly wears an expression of terror and fear, with a prominent brow ridge that lacks eyebrows. His eyes are narrow and often appear to be squinting, lacking any visible pupils.
He has dark shoulder length wavy hair with a low hairline, only growing out from the back of his head and ears, who themselves are sharper and longer then a normal humans.
His nails are long but not sharp like most other demons and retain their natural square form.
Clothing wise he wears a dark kimono that is split in the middle, the right half being covered in a pattern of flowers and lines with the left half being dark and lacking any detailed features. He also wears dark pants and zōri.
Hantengu's primary form had a persona of cowardice. He was easily frightened by what occurred in his surroundings, showing traits of paranoia, fear and delusion, as, despite the obvious evidence of his numerous crimes as a human, he still believed that he was innocent and didn't do anything wrong. Even as a Demon, killing and eating scores of innocent people, he still stubbornly and delusionally believed that he was innocent. The more threatened he felt, the stronger his other personalities became.
Overall Abilities: Having held the position of Upper Rank 4, Hantengu can be considered to have been the fifth strongest Demon in the series. His weaker clones were able to hold off and overwhelm Tanjiro Kamado, Nezuko Kamado and Genya Shinazugawa, all 3 which are extremely talented combatants. Once four of his clones combined to form Zohakuten, he was able to overwhelm the aforementioned 3 Demon Slayers as well as the Love Pillar, Mitsuri Kanroji.
Immense Strength: Hantengu and his clones have incredible physical strength. Urami shown being capable of holding Tanjiro Kamado down with his bare hands and it took the combined effort of a demonically enhanced Genya Shinazugawa and a Demon, Nezuko Kamado.
Immense Speed & Reflexes: As an Upper Rank Demon, Hantengu possesses incredible movement speed, being able to outspeed Tanjiro Kamado, Genya Shinazugawa and Nezuko Kamado. It required Tanjiro combining his Hinokami Kagura and Zenitsu Agatsuma's Thunder Breathing for him to catch up.
Unlimited Stamina & Endurance: Hantengu possesses absolute and infinite stamina and vitality, never tiring and always remaining in optimal physical and mental condition all the time as well as being able to endure waves of onslaught as if it were nothing.
Immense Durability: Hantengu, like all Demons, has superhuman durability. Not even Genya's Sun Steel bullets or sword could penetrate his flesh, despite Genya using his demon enhanced strength to further strengthen his attacks. Even with Tanjiro Kamado's crimson katana, he couldn't make a slight dent in his neck.
- Enhanced Stealth: Hantengu's skill in stealth seems to be his most formidable ability when not divided into his clones as can be seen when he managed to easily infiltrate the blacksmith village of the Demon Slayer Corps, one of their most vital and well fortified bases, without any of the numerous guards noticing. Later on he managed to sneak up on both Muichiro and Tanjiro without them noticing, despite the former being a Hashira and having prodigal skill and talent in battling demons and the latter's superhuman sense of smell.
Immense Regeneration: As an Upper Rank, Hantengu's regenerative abilities are incredible even among the the ranks of the Twelve Kizuki. He and his clones displayed the capability of healing from slashes, burns or even gunshots to their body or head effortlessly and instantaneously.
Emotion Manifestation: Hantengu's main ability is to manifest his emotions as powerful younger clones of himself with their own unique appearances, personalities and abilities. These clones also seem to embody a certain emotion Hantengu has felt before, and has shown to only feel that specific emotion. Each is identified by their clothing and a kanji tattoo in their tongue labeling their core emotion. Hantengu developed this ability through being constantly cornered, with his intense emotions intensifying and becoming physical manifestations through his demon blood.
|One of the first two clones split from Hantengu, Sekido, who is the embodiment of Hantengu's anger.
Lightning Generation: Sekido's main ability is to summon extremely powerful lightning strikes and manipulate them at will. The lightning attacks themselves are powerful enough to nearly kill fellow demons, as seen with Nezuko, and to completely paralyze demon slayers. However a weakness to this is that Sekido cannot electrocute something created from his own cells as seen when he could not channel his lightning through the severed leg of Urogi.
|One of the first two clones split from Hantengu, Karaku, who is the embodiment of Hantengu's relaxation.
|The third emotion clone split from Hantengu, Aizetsu, who is the embodiment of Hantengu's sorrow.
|The fourth emotion clone split from Hantengu, Urogi, is the embodiment of Hantengu's delight.
|The most powerful emotion clone of Hantengu formed by Sekido's absorption of Karaku, Aizetsu, and Urogi. Zohakuten is the embodiment of Hantengu's hatred.
|The final emotion body detachment split from Hantengu, Urami, who is the embodiment of Hantengu's resentment.|
Master Combatant: Hantengu is an expert in various forms of armed combat, including a Khakkhara staff, a gigantic leaf fan and a Yari spear, each of his combat skills able to keep up with several master combatants simultaneously.
Hantengu's techniques are mainly used by his clones created through his Blood Demon Art. His techniques have only been displayed by two of his clones, Aizetsu and Zohakuten.
- Weeping Spears (
激 涙 刺 突Gekirui Shitotsu?): Aizetsu violently thrusts his Yari multiple times in rapid succession towards his opponent, expanding and contracting it incessantly, allowing him to extend his range and attack potency significantly.
- Countless Striking Trees (
無 間 業 樹Muken Gōju?): Zohakuten unleashes his dragon-like trees towards the enemy, making them rapidly grow bigger and multiply as they rush towards his opponent.
- Crazed Cry of Thunder Death (
狂 鳴 雷 殺Kyōmei Rai Satsu?): An attack utilized by Zohakuten's wooden dragons, which demonstrate the ability to combine the unique powers of Urogi and Sekido's powers to create an attack of thunder and sound.
- Muzan sees Hantengu as normal but sometimes he's so annoying it's intolerable.