Base B (ベースB, Bēsu B)[1] is a prisoner of the Smelly Lid Prison.


Base B is a muscular built man with vertical stitches over his eyes and chest. He wears his hair in a long mohawk and has dark lines around his eyes, dark lips and pierced ears. He wears striped pants and his shirt tied around his waist.


Base B received multiple scars from the multiple surgeries he did to change his body to become a powerful prisoner. He also has pieces of heads sewn into him taken from past powerful criminals.[1]


Human Monster SagaEdit

Monster Raid ArcEdit

PicsArt 10-11-04.52.09

The "4 prisoners" trying to stop Nyan

A cat-like monster, called Nyan broke into Smelly Lid Prison searching for Puri-Puri Prisoner. Base B and the other prisoners question the monsters motives.[2]

Appearances in Other MediaEdit



Base B tried to intimidate Sonic by bumping into him rather hard only to notice Sonic dislocated his shoulder.[3]

Abilities and PowersEdit

Base B can bend iron bars.[1]


  • "Yaaaow!! He dislocated my shoulder!


  • Base B is so named due to his scars resembling a baseball ball.[1]


  1. 1.0 1.1 1.2 1.3 1.4 1.5 One-Punch Man Encyclopedia; One-Punch Man: Hero Perfection, page 184
  2. One-Punch Man Manga; Chapter 66, page 15
  3. One-Punch Man Omake; Prison

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