Zenitsu Agatsuma, the thunder-breathing scaredy-cat from Demon Slayer, has shocked millions with his Godspeed slashes, sleeping swordsmanship, and transformation from coward to clutch hero. As the yellow-haired slacker of the Demon Slayer Corps, Zenitsu proves that fear can fuel lightning.
Who is Zenitsu Agatsuma?
Zenitsu Agatsuma (我妻 善逸) is a main supporting character of Koyoharu Gotouge’s Demon Slayer: Kimetsu no Yaiba (manga 2016–2020, anime 2019–present). Introduced in chapter 6 and episode 4, he’s a Demon Slayer and Thunder Breathing user who joins Tanjiro after the Final Selection.
Zenitsu Agatsuma Wiki
| Full Name | Zenitsu Agatsuma |
| Nickname / Alias | Zenitsu, Thunder Boy, Godspeed Zenitsu, Nezuko’s Simp |
| Age | 16 (main series) → ~18 (2025, post-Infinity Castle) |
| Gender | Male |
| Date of Birth | September 3 |
| Friends | Shikamaru |
| Hometown | Unknown (orphaned, raised by Jigoro) |
| Family Members | Jigoro Kuwajima (mentor/grandfather figure, deceased), Kaigaku (rival) |
Physical Appearance
| Height | 164 cm (5’5″) |
| Weight | 58 kg |
| Hair Color | Blonde (dyed, originally black) |
| Eye Color | Brown |
| Skin Color | Fair |
Demon Slayer Career
| Occupation / Role | Demon Slayer (Kanoe rank), Thunder Breathing User |
| Team | Tanjiro, Inosuke, Nezuko, Kanao |
| Mentor / Teacher | Jigoro Kuwajima (Thunder Breathing), self-taught Godspeed |
| Affiliation(s) | Demon Slayer Corps, Infinity Castle Survivors |
| Status (2025) | Alive, married to Nezuko (manga epilogue), living peacefully |
| Debut (Anime) | Episode 4 (2019) |
| Debut (Manga) | Chapter 6 (2016) |
| Voice Actor (JP) | Hiro Shimono |
| Voice Actor (EN) | Aleks Le |
Powers & Combat Profile
| Breathing Style | Thunder Breathing (First Form only in sleep) |
| Signature Move | Thunderclap and Flash: Godspeed (10x speed burst) |
| Weapon | Nichirin Sword (yellow blade, lightning pattern) |
| Notable Battles | vs Spider Demon, vs Kaigaku (Upper Six), vs Daki (shared) |
Social Media Presence
- X (Twitter) Fan Account: @ThunderZenitsu
- Reddit: r/KimetsuNoYaiba
- TikTok: #ZenitsuAgatsuma
Zenitsu Agatsuma Story
Orphaned and sold to pay debts, Zenitsu is saved by Jigoro Kuwajima and trained in Thunder Breathing. A chronic coward, he only unleashes full power while asleep — until love for Nezuko awakens his courage.
His thunder path:
- Final Selection: Passes by luck, joins Tanjiro’s squad.
- Mugen Train: Thunderclap and Flash saves train, earns respect.
- Entertainment District: Fights Daki, unlocks Honoikazuchi no Kami.
- Infinity Castle (2025): Defeats Kaigaku, becomes Upper Rank killer, marries Nezuko in epilogue.
Zenitsu’s spark: “I’m scared… but I’ll protect Nezuko-chan!”
Powers and Abilities
Zenitsu channels fear into lightning:
- Thunder Breathing – First Form only: Thunderclap and Flash (Mach 1+ speed).
- Godspeed: 10-fold speed burst, leaves afterimages, cuts demon necks instantly.
- Honoikazuchi no Kami: Dragon-shaped slash, pinnacle of Thunder Breathing.
- Sleep Mode – Unconscious combat: Full power, no fear, perfect form.
- Super Hearing – Detects demon footsteps from kilometers, predicts attacks.
- Post-Infinity Castle: Awake Godspeed — controls power consciously.
Example: vs Kaigaku — Honoikazuchi no Kami severs Upper Six head in one strike.
Personality Traits
Zenitsu is cowardly, dramatic, and deeply loyal:
| Trait | Awake | Asleep |
|---|---|---|
| Primary | Screaming, girl-crazy | Silent, deadly |
| With Nezuko | Obsessive simp | Gentle protector |
| In Battle | Runs away | Unstoppable force |
Post-series : Mature husband, still cries at spiders.
Famous Quotes by Zenitsu Agatsuma
- “Nezuko-chaaaaan!”
- “I’m gonna die! I’m gonna die!”
- “Thunderclap and Flash… Godspeed!”
- “Even if I’m scared… I’ll fight for the people I love!”
Popular Fan Theories
Hot in :
- Zenitsu’s Hair: Black roots = original color; blonde from lightning strike trauma.
- Godspeed Evolution: Infinite speed if fully awake (fan calc).
- Zenitsu’s Child: Thunder + Box = lightning-fast baby with Nezuko.
- Season 5 (2025): Zenitsu solo episode on Kaigaku rematch.
Unknown or Fun Facts about Zenitsu Agatsuma
- Debt Origin: Sold for gambling debts; Jigoro paid them all.
- Hearing Range: 5 km+ — hears Tanjiro’s heartbeat in sleep.
- Voice Actor: Hiro Shimono also voices Connie (Attack on Titan).
- Fear: Everything — but Nezuko’s smile = courage.
FAQs
Q1. Is Zenitsu married in 2025?
Yes — to Nezuko, has descendants (manga epilogue).
Q2. What is Godspeed?
10x speed burst of Thunderclap and Flash, used awake post-Infinity Castle.
Q3. Why does Zenitsu sleep-fight?
Fear paralysis — unconscious mind removes mental blocks.
Q4. What is Zenitsu’s height and birthday?
Height: 164 cm (5’5″) | Birthday: September 3
Q5. Did Zenitsu create a new form?
Yes — Honoikazuchi no Kami, 7th Thunder Form.
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