My Hero Academia Wiki
My Hero Academia Wiki

Oxy-Man (酸素-おとこ Sanso-Otoko?)[1] is a minor villain that was recruited by the League of Villains to assault on the U.S.J., making him a minor antagonist of the U.S.J. Arc.


He's a young man of average height and build. He has ash blond hair.

His villain outfit consists of a black jumpsuit, matching gloves, and a wireless headset. He also has transparent blue goggles that allow him to swim without closing his eyes, as well as a spear with which to attack his opponents.



U.S.J. Arc

After invading the U.S.J., Oxy-Man and other villains head to the Flood Zone, as their Quirks gave them an advantage in that area. There they wait patiently until Izuku Midoriya, Tsuyu Asui and Minoru Mineta are sent to that area by Kurogiri with his Warp Gate Quirk.[2] Despite outnumbering them, the villains are wary of the three students as they do not know their Quirks, until they finally decide to go on the attack.

Izuku uses Delaware Smash on the surface of the water creating a whirlpool that drags in the villains. Minoru then uses his Quirk to launch a large number of sticky spheres into the water, causing all the villains in the water to be stuck together. With her Frog Quirk, Tsuyu escapes the area along with Izuku and Minoru, while the villains are unable to do anything and thus defeated.[3]



Unnamed Oxygen Production Quirk: Oxy-Man's Quirk allows him to produce oxygen for his body, allowing him to dive underwater without drowning.[4]

Battles & Events

Battles & Events

Chapter Appearances

U.S.J. Arc
12. Yeah, Just Do Your Best, Ida! Absent
13. Rescue Training Absent
14. Encounter with the Unknown Debut
15. Vs. Appears
16. Know Your Enemies Absent
17. Game Over Absent
18. Heroes' Counterattack Absent
19. All Might Absent
20. The World of Pros Absent
21. In Each of Our Hearts Absent

Anime Appearances

Season 1
1. Izuku Midoriya: Origin Absent
2. What It Takes to Be a Hero Absent
3. Roaring Muscles Absent
4. Start Line Absent
5. What I Can Do for Now Absent
6. Rage, You Damn Nerd Absent
7. Deku vs. Kacchan Absent
8. Bakugo's Start Line Absent
9. Yeah, Just Do Your Best, Ida! Absent
10. Encounter with the Unknown Debut
11. Game Over Absent
12. All Might Absent
13. In Each of Our Hearts Absent


  • His villain name appear as 酸素-おとこ in the Ultra Archive databook, and written in Katakana as サンソマン (Sansoman) in the Ultra Analysis databook.


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