Zenitsu

Biodata

Power Progression

Appearance

Zenitsu is a boy with medium-short golden hair who wears a yellow haori 20.

• Carries a Nichirin Blade 20.
• Was visibly wounded and trembling after Final Selection 12.

Personality

Zenitsu is anxious, tearful, and prone to expecting the worst. His fear can disrupt his concentration and leave him unable to fight effectively, but concern for others can push him to act despite it 22 28.

He is openly infatuated with Nezuko and wants to become strong enough to protect her. He also exaggerates his injuries and accomplishments, sometimes to attract attention 24 25 47.

Abilities & Skills

Thunder Breathing

Zenitsu trained with his grandfather and specializes in the First Form, Thunderclap and Flash 22 28.

• Used a burst of speed to evade Spider Brother’s acidic attack while conscious 28.
• Beheaded three Demon Servants in a single high-speed attack after collapsing from fear 22.
• Used Sixfold Strike to kill Spider Brother and cut down the Human-Faced Spiders after losing consciousness 28.
• His fear can disrupt the technique, and his endurance limited how long he could maintain an advantage during pursuit training 28 38.

Extraordinary Hearing

Zenitsu can hear faint sounds that others might miss, including a woman singing beneath the Kinutatsuki Town shrine and spider silk moving on Mount Natagumo 20 26.

• His sensitivity also exposes him to frightening sounds, intensifying his anxiety 28.
• He tried to use his hearing to detect his internal energy during Armament Haki training, but could hear only his heartbeat and blood flow 39.

Training

• Breathing Style: Constant: Practiced flexibility, reaction, pursuit, and gourd exercises at the Butterfly Mansion, but was still struggling to maintain the breathing rhythm in Chapter 39 38 39.
• Armament Haki: Learned the basics from Moyu and attempted to coat his Nichirin Blade, though he struggled with the technique 39 40.

Relationships

• Tanjiro Kamado — Companion who treats Zenitsu patiently. Zenitsu protected Tanjiro’s wooden box from Inosuke because he had promised to guard it 23 25.
• Nezuko Kamado — Zenitsu is infatuated with her and is motivated by the desire to protect her. She recognized him after gaining the ability to stand in sunlight 24 38 66.
• Moyu — Fellow Final Selection survivor and companion. Moyu defended Zenitsu from Inosuke, encouraged him through training, and taught him Armament Haki 12 23 38 39.
• Inosuke Hashibira — Fellow Demon Slayer with whom he frequently quarrels. Inosuke attacked him over Nezuko’s box before joining the group 23 25.
• Grandfather — Trained Zenitsu in Thunder Breathing; Zenitsu thinks of him when frightened or in danger 20 28.

Story Role

Final Selection and the Drum Mansion

Zenitsu survived Final Selection and chose tamahagane for a Nichirin Blade. He later met Moyu and Tanjiro in Kinutatsuki Town, where his hearing helped identify the source of a demon’s singing. After Moyu killed the Lullaby Demon, Zenitsu joined them on the road 12 20.

At the Drum Mansion, Zenitsu was separated from the others with Shoichi. Cornered by five Demon Servants, he collapsed from fear and injuries before rising with his eyes closed and killing three. Outside, he protected Nezuko’s box from Inosuke until Moyu intervened 22 23.

Mount Natagumo and Recovery

Zenitsu initially stayed at the mountain’s entrance to guard a rescued Corps member. After hearing a scream, he entered the forest and encountered Spider Brother. Poisoned by Human-Faced Spiders, he lost consciousness, killed Spider Brother with Sixfold Strike, and collapsed. A girl in a butterfly-patterned haori gave him an antidote and carried him away for treatment 26 28.

At the Butterfly Mansion, Zenitsu underwent rehabilitation and trained in Breathing Style: Constant and Armament Haki. Moyu took the Mugen Train assignment in place of Zenitsu, Tanjiro, and Inosuke, sending them on other missions instead 37 38 39 40 41.

Entertainment District and Later Training

Zenitsu joined Tengen Uzui’s Entertainment District mission alongside Tanjiro and Inosuke, despite objecting to the planned disguise. The boys helped defeat lesser demons and relocate women imprisoned beneath Ogimoto House 48 51.

He later left for Hashira training, briefly returning to the Butterfly Mansion when Nezuko gained the ability to stand in sunlight. After spending a day with her, he returned to training 61 66.