Machio Naruzo (街雄 鳴造, Machio Naruzō; "Naruzo Machio") is a bodybuilder and personal trainer at Silverman Gym who regularly coaches the main characters from Koyo Girl's Academy and one of the series protagonists.


Machio is a tall man of fair complexion. He has messy short black hair, blue eyes, and a very handsome profile. He is most commonly seen wearing a blue and white tracksuit. Although he normally appears to be a slender of average frame, he is in fact very muscular. Once flexing, he reveals such a deceptively large and well-defined physique, which is a complete contrast to his babyface, that he literally rips apart his clothing as he bulges out until all he is left wearing are his Speedos.

Image Gallery


Machio is by nature a very kind a helpful man who is dedicated to help the members of the Silverman Gym better themselves. When Hibiki asked him if he would laugh at her after she is barely able to complete three sets of bench presses, he answers that he cannot laugh at someone trying their best.[1] He is noted to have a charming personality and he is very knowledgeable about bodybuilding and exercise.

Machio's running gag involves him doing a bodybuilder pose where he bursts out of his clothing to reveal his well-built body. So fixated on physical fitness and his own physique, he looks for almost any excuse to show off, as even words that remind him of his muscles compel him to flex. He appears to be oblivious to how much his body freaks people out and apparently has no shame about being almost naked in public. On one occasion, it was shown that he would board a plane in only his Speedos if they let him.


Little is known about Machio's past, but, it is known that he has been incredibly buff since high school, due to being a member of the football team. He went to the U.S. to study sports theory and studied under Harnnold Dogegenchonegger.


Machio appeared when Hibiki tried to leave the Silverman Gym due to the too many macho men training there though immediately changed her mind after seeing him.

On their introductory session, he aided Hibiki and Akemi in bench pressing. He then shows of his physique for the first time.


Physical Abilities

As his physique would imply, his strength is leagues above the average human, able to crush an iron grip in a single hand. By his own account, he was strong enough to bench 100kg and bicep curl 50kg dumbbells when he was just starting out. His muscles are so developed that he is able to effortlessly tear through his clothes simply by flexing. His muscles control even allow him to choose which parts of his body bulge through his clothes.


Sakura Hibiki: One of the students from Koyo Girl's Academy whom Machio coaches. Hibiki has a crush on him but he is oblivious to her infatuation towards him. He is quite interested in her strength.

Soryuin Akemi: One of the students from Koyo Girl's Academy whom Machio coaches. The two usually explain workouts and diets.

Tachibana Satomi: A history teacher from Koyo Girl's Academy whom Machio coaches. Like Hibiki, she has a crush on him.

Uehara Nana: Nana is an old friend of his from Elementary school. The two are occasional co-workers.

Sakura Ibuki: Ibuki is a friend of his from high school.

Harnnold Dogegenchonegger: Harnnold is his mentor from his time in the U.S. They lost contact with each other after separate incidents where their phones were destroyed. The two plan to compete against each other one day.

Utsunomiya Koharu: Koharu is a co-worker of his from another Silverman Gym branch. The two get along and respect each other.

Toyoda Tadakatsu: A ghost that tried to attack him. After he inadvertently and unknowingly impressed Tadakatsu with his muscles, the ghost developed an adoration for him and joined Silverman Gym. He is unaware Toyoda is a ghost.

Notes & Trivia


  1. Chapter 2
  2. 4koma: Commercial


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