Goto Imasuji

Muscular (マスキュラー) is a villain affiliated with the League of Villains and also part of its Vanguard Action Squad. He and the rest of his team serve as the main antagonists of the School Trip Arc.

Appearance
Muscular is a tall, bulky man with spiky blond hair. He has an enormous scar on his left side of his face that reached from his front to his mouth, he had lost his left eye and replaced it with a prosthetic one.

His outfit consists of a black cape and a mask with several small holes in it. Underneath the cape he wears a red tank top and dark-colored pants and boots.

Personality
Muscular has a very cruel, brutal and blood thirsty personality, showing great pleasure in killing people, heroes and civilians alike, even including young children.

History
At some point in his past, Muscular fought against the hero team Water Hose, killing them. He was, however, gravely injured during the conflict, losing his left eye and acquiring an enormous scar on his face.

School Trip Arc
Muscular joins the rest of the Vanguard Action Squad as they look down at the summer camp, mentioning that he can't wait to start the operation. the villain with the gas mask then reminds him that they are not supposed to do anything flashy and Dabi agrres with him since they only want to make a beacon. After the Vanguard action squad spread out, Muscular appears behind Kouta. He tells Kouta that he was looking for a good vantage point and notes that he is surprised to find someone who was not on the handout he had got from the League of Villains. He then proceeds to compliment Kouta because of his cap and asks him to trade the hat for his mask since he does not like his current mask. Kouta, however, runs away while Musuclar is taking his mask off and Muscular uses his speed to reach Kouta. Muscular then activates his Quirk and prepares to attack the boy. His attack dos not reach Kouta because the boy is saved by Midoriya. Mucsular notes that Midoriya was on the list. Midoriya then declares that he is going to save Kouta from the villain.

Musucular laughs about Midoriya's words and tells Midoriya that he is one of the students who he must kill immediately. Muscular launches himself at Izuku and smashes him into a wall. While he is preparing to punch him again he asks Izuku where Bakugou is. But instead f letting the boy talk, he attacks him again and says that Midoriya does not know where so that he can fight without restrictions. Midoriya is defenseless against Muscular's attacks and gets mocked by Muscular because he mentioned that he woudl save Kouta from Muscular no matter what. Midoriya uses his Quirk to launch himself at Muscular but he blocks the attack by engulfing his arm in muscle fiber. He then smacks Izuku with his arm and proceeds to introduce his Quirk.

He continues to mock Midoriya and as he prepares to finish him off, Kouta throws a rock at him. Kouta reveals that his parents were Water Hose and Muscular mentions that this meeting must be fate. After explaining that he killed Kouta's parents because he felt like it and accuses Kouta's parents of not being able to do what they wanted. He then attacks Kouta but is stopped by Midoriya once more. Instead of attacking Muscular's arm he tangles his broken arm into Muscular's muscle fiber. Midoriya then punches Muscular with his other arm with all of his strength.

Muscular is hit by the attack and he creates a shield out of muscle fiber to protect himself. Muscular compliments Midoriya for this attack and he starts moving towards him. Midoriya asks him to stop and wants to know why the League of Villains is attacking them. Muscular claims that he has no clue and that he only wants to run wild. He starts to look for his "serious eye" in his pocket since he noticed that Izuku is pretty tough. When he put his serious eye on, Midoriya flees with the help of his Quirk while he is carrying Kouta on his back and Muscular starts to chase after them.

Midoriya decides to stop running away and tries to withstand Muscular's attack by using the Detroit Smash but since this attack is weaker than the one he used earlier, Muscular smashes Izuku into the ground. Before he can kill Izuku, Kouta uses his Quirk to stop him but Muscular tells Kouta that he is next. This short distraction gives Izuku enough time to use the 1 000 000% Deleware Detroit Smash which defeats and incapacitates Muscular.

After the Vanguard Action Squad succeed in capturing Katsuki, the Police Force arrive and immediately arrest Muscular.

Quirk and Abilities
Muscle Augmentation (筋肉増強): Muscular's Quirk allows him to augment the muscle fibers that are beneath the skin, increasing the power and speed of his movements. He has also been shown to use his quirk for defense; by carrying his whole body in augmented muscle fiber.

Immense Strength: Muscular has shown extreme levels of physical strength. Even without using his Quirk, he is able to send Izuku flying with remarkable force with merely a simple kick. When using his Quirk to augment his strength, he has shown to be able to easily shatter rock and overpower Izuku with minimal effort, even when playing around. After going serious, his reinforced strikes were able to cause destruction on a similar scale to Izuku's 100% Detroit Smash. He was also able to directly overpower Izuku, who was using One For All 100% at the time, in a physical clash.

Immense Durability: Muscular was shown to have a frightening level of impermeability to physical harm. When using his Muscle Augmentation, he was able to take the full brunt of Izuku's 100% Detroit Smash with minimal injury. Indeed, he was incapacitated only after Izuku went beyond his limit with One For All.

Enhanced Speed: Muscular was shown to be surprisingly swift. He was able to catch Izuku off-guard several times during their fight. When using his Muscle Augmentation, he can launch himself off the ground at blurring speeds.

Equipment and Weapons

 * Prosthetic Left Eye: He has a number of different replacements with unknown capabilities.

Battles
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School Trip Arc
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 * Izuku Midoriya and Kouta vs. Muscular: Lose