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Rosie (ロジー, Rojī; Viz: Rogy) was a martial artist and user of the Psycho Analysis Martial Arts.

After eating Monster Cells, offered by Gouketsu, Rosie became a Mysterious Being and joined the Monster Association. He was killed by Choze.[1]


Rosie was a young man with light-colored eyes and grey hair that parted to the left and had an undercut. He wore an Air Force Blue suit with a white shirt underneath and a red diamond-patterned tie.

After eating the Monster Cells he grew more muscular and larger in size, and also had some protrusions sticking from his back.


Rosie was very ambitious and planned to revolutionize psychology and logic in martial arts. Deep inside, he was a coward who was easily willing to do anything to survive, even if it meant abandoning his martial art style and his own humanity for the sake of surviving as he is the first one to rush to eat the Monster Cell.

As a monster, he was quite vengeful and sadistic, as he beats a heavily injured Dave to avenge his humiliating defeat in the first round of the tournament.


Human Monster Saga[]

Monster Raid Arc[]

Rosie is participating in the Super Fight Tournament in C-City at the C-City Super Stadium. This is the first time Rosie has participated in the tournament.[2] While watching the match between Max and Suiryu, he was shocked by the strength of the latter, easily defeating his opponent.[3] He was matched and defeated by Dave without much difficulty.[4]

Super Fight Arc[]

As he was being taken to the hospital, The Three Crows took him hostage and brought him back to the stadium, along with Dave and Bazuzu.[5]

Rosie and the martial artists were given an offer by Gouketsu, to either eat the Monster Cells and join the Monster Association, or die. Rosie was the first to eat it and after becoming a monster, he sadistically throws a heavily injured Dave into the distance to avenge his defeat in the tournament. However, his victory is short-lived as Choze quickly snaps his neck, killing him.[6]

Abilities and Powers[]

Not much is known about Rosie's strength. Despite his strength as a monster, being able to knock around Dave who is considerably heavy, he was easily beaten by a human Choze. However, he seemed to have a decent amount of willpower as he did not lose his mind upon transformation.

Physical Abilities[]

Enhanced Strength: After becoming a monster, his strength increased to where he could toss Dave high into the sky with one arm.

Enhanced Durability: In his human form, he survived being crushed by Dave with enough force to make a crater in the arena.

Fighting Style[]

Psycho Analysis Martial Arts (心理分析格闘戦術, Shinri Bunseki Kakutō Senjutsu; Viz: Psychoanalytic Martial Arts): Not shown. He analyzes his foe's psychology and turns it in his favor.[7] This style was actually useless in his first match in the Super Fight tournament since he was crushed by Dave in mere seconds before he could even react. It is worth noting, however, that since Dave's style is simply crushing people, it is possible it at least doesn't work on extremely simplistic styles like that one.


Rosie's name ロジー, Rojī is a pun on ロジック, "logic".

Major Battles[]

Participants Chapter(s) Episode(s) Result
Rosie vs. Dave (Off screen) 63 18 Loss


  1. One-Punch Man Manga and Anime; Chapter 72, and Episode 20
  2. One-Punch Man Manga; Chapter 60, page 6
  3. One-Punch Man Manga; Chapter 62, page 15
  4. One-Punch Man Manga; Chapter 63, page 4
  5. One-Punch Man Manga; Chapter 71, page 38-41
  6. One-Punch Man Manga; Chapter 72, page 12-16
  7. One-Punch Man Manga; Chapter 60, page 6


Martial Artists
Heroes BangMaxSneck
Unaffiliated BazuzuBombCharankoDaveGatlinJakumenLin LinMentaiSour FaceSuicho SuikoSuiryuZakos
Mysterious Beings
Dragon (or higher) Boros Orochi *
Demon 170,000-Year-Old Cicada Larva 170,000-Year-Old Cicada Adult Armored GorillaAwakened Cockroach Baquma Beast King Bruinado Bug God Building Booper Deep Sea King Demonic Fan Devil Long Hair *Do-S *Eyesight Face Ripper Fist Fight Djinn Free Hugger G4 G5 Game-Berus Giant Crow Grizzly Nyah Hundred-Eyes Octopus Jumping Spider Macho Daikon Mosquito Girl Rafflesidon Rhino Wrestler Royal Ripper Scaledon Senior Centipede Showerhead Sky King Subterranean King Super Mouse Surprise-Attack Plum The Great Food Tub The Three Crows Unihorn Vampire (Pureblood) 
Wolf Himawari Hotdog Messenger of the Seafolk Piggy Bancon Tongue Stretcher
Less than Wolf
Unknown Alien Seer *Ancient King Angry Grandpa Autumn Phantom Red Golden-ringed Dragonfly *Benpatsu *Choze DarkDark Matter Gunner Eagle Enamel Evil Eggs Evil Eye Evil Natural Water *Falcon Fish of DarknessGale Giant Salamander Gigakigan Goddess Glasses Gyoffrey Hamukichi *Haragiri Hawk Hellfire Junior Centipede Kite Lord Great White ManakoMen's Esthetician Man *Platinum Sperm Rosie Raptora *RepteraSage Centipede Suppon Sword Devil Executioner Venus Mantrap Volten *
S-Class Gale WindHellfire FlameSpeed-o'-Sound Sonic
B-Class Hyaha Axe
Ex-Villains Dr. GenusHammerheadMen's Esthetician Man
Undetermined Class