Fukegao

Hukegao (フケガオ Hukegao) was a genius scientist who developed the Biceps Brachii King steroid, which turned his brother Beefcake into a mutated giant. He was accidentally killed by Beefcake when the latter mistook him for Saitama.

Appearance
Hukegao is a skinny and pale young man, though with his fair share of wrinkles. He has thin black hair that is parted in the middle, draped along the sides of his face. He has a long face. He dresses in typical scientist clothes, a long white lab coat and a regular back shirt.

Personality
Hukegao has a great hunger for power, the need to conquer the world. He is delusional and by creating a superhuman drug, he strived for him and his brother to be the most powerful duo in the world, promoting himself as the most intelligent person on the planet, which also gives him an arrogant appearance.

Saitama Introduction Arc
Having spent considerable time making a steroid drug, he finally succeeded in completing the ultimate steroid, the Biceps Brachii King. In his lab, he hands it to his brother and tells him to drink it. Beefcake does so and the drug takes effect, causing his muscles to burst out of his clothes and his body expanding to the size of a skyscraper. Hukegao is amazed by this and yells out that the Brain and Brawn Brothers will conquer the world. However, the rumble of the wrecked lab falls on top of Hukegao and he gets stuck. He calls out to his brother, who releases him and puts him on his giant shoulder. Hukegao again declares that together, they have the greatest intellectual and physical power in the whole world. They march on towards D-City where Beefcake, upon entering, destroys several buildings with a mere swing of his fist. Hukegao is astounded by his brother's strength and is excited by the death of so many people at once. He motivates his brother to wreck the next town as well.

At B-City, he cheers his brother on but lets out a surprised scream when he notices Saitama on his brother's other shoulder. He orders his brother to kill him, but Beefcake mistakes which shoulder Saitama is on and accidentally slaps the shoulder where Hukegao is sitting, killing him.

Abilities
Hukegao was an individual of exceptional intelligence. He was responsible for creating the Biceps Brachii King drug.