Waganma

Waganma (ワガンマ, Waganma) is the son of Narinki and later was taken hostage by the Monster Association.

Appearance
Waganma strongly resembles his father, having short, light colored hair with sideburns that curl inwards and large lips. His formal attire consist of a light colored business suit and a polka dot bow tie.

Personality
Waganma is a curious child willing to try commoners sushi, but doesn't understand the etiquette of dining. He has faith that the heroes will rescue him when he was kidnapped. He is shown to be quite bratty, self centred & manipulative, as he is willing to let Tareo be saved only if he follows his orders. He also displays immense cowardice, irresponsibility and weak willed behaviour, as he let his fellow prisoner be taken by Royal Ripper at a moments notice, then selfishly pretends he was the only captive when asked by Child Emperor if there were more hostages. Additionally, he recoiled into simpering obedience at Child Emperor’s brutality, despite Waganma's whiny and pampered attitude.

Monster Raid Arc
At a sushi restaurant Waganma and his father Narinki meet Metal Bat, who is tasked to guard them from Garou. As Waganma was trying different foods, he kept returning the plates on the conveyor belt, which frustrates Metal Bat. Shortly after, a rumble occurs and Waganma gets grabbed by Junior Centipede and Venus Mantrap.

Metal Bat quickly freed Wagnma and disposed of the monsters. They are then attacked by Senior Centipede and Rafflesidon who are members of the Monster Association. Waganma and his father were then knocked out by Rafflesidon's gas. After Metal Bat defeated the monsters, he ordered Pineapple and Mohican to take Waganma and Narinki to the hospital, however Elder Centipede emerged through the ground to kidnap him. As he was being carried by the Pineapple, they were cornered by Elder Centipede, until Metal Knight came to test his weapons and drew the attention away from them. As the heroes carry them to safety, Rhino Wrestler, Phoenix Man and Sludge Jellyfish demand for Waganma and his father. Waganma was later captured by the Monster Association and taken to their hideout.

Waganma is later seen tied up in chains in the Monster Association headquarters, as a hostage.

Monster Association Arc
Waganma was confined in his prison cell when Royal Ripper brought Tareo along. Waganma mentions that he was captured the day before and that he was fed only bread and water. He expresses his hunger and quickly snatches a candy from Tareo and asks if he has any more food. Waganma comments on Tareo's uselessness and the monster's stupidity for capturing him as his father is an important figure to the Hero Association. Waganma tells Tareo that the heroes will come save them, though mentioning that his safety comes first. He recruits Tareo as his lackey in exchange for all the food Tareo receives.

Sludge Jellyfish goes to the cell where Tareo and Waganma are being held, and tells them there is no hope for either of them to be saved. Waganma disagrees, and says the Hero Association has plenty of heroes, and goes off to list the names of several heroes, such as Metal Bat and King. At the mention of King's name, Sludge Jellyfish becomes frightened, but confidently states the whole purpose of the Monster Association is to eliminate such heroes, and goes on to mention the Executive Members of the Monster Association, speaking in awe of their strength and remarking they must have been created by God. He states that there is no way humanity can win, and even King will fall.

Waganma is saved by Child Emperor, who took out the guards with poison gas. He whines at the hero's tardiness, only to quickly apologise at Child Emperor's stern look. They come across G5 who easily resists Child Emperor's initial attacks. Waganma is told to stay back behind the hero. As Child Emperor distracts G5 with Mad Dog Underdog Cerberus, Waganma and the hero escape. Waganma asks why Child Emperor didn't assist his robot to battle G5 and he replies saying saving him is their top priority right now to which Waganma hastily agrees.

They come across Phoenix Man's shredded remains and Waganma recognises the monster from the black comedy TV show, Animal Kingdom, which was eventually cancelled due to its black humor. He explains that the character, Birdbrain, would often be killed through his stupidity but revive the next episode as if nothing happened. Suddenly, a bright light flashes behind Waganma and Resurrected Phoenix Man appears. The monster sends searing hot winds at them and Child Emperor protects Waganma with his umbrella projecting shield. The hero leaves him there to confront the monster.

Child Emperor is forced to summon his ace, Brave Giant, and do battle against Phoenix Man. During their battle the hero protects Waganma from further danger and eventually tricks Phoenix Man into destroying his costume. Now powerless, the monster is defeated by Child Emperor. Waganma expresses discontent at the hero's lack of power and protection, before being asked if there were any other hostages.

Waganma recalls Tareo but lies and says he is the only hostage. They leave the scene and make their way to the exit.

Trivia

 * "Waganma" is a play of words of "Wagamama" (我が儘) which means "selfish​".