
Presented at first as a kindly scientist devoted to justice, this elderly genius is the man who rebuilt Genos as a cyborg and continues to service the young hero's body. He treats his creation almost like a grandson, though the webcomic eventually reveals a far more sinister side to him.
Age shows plainly in this slender old man. A bowl-shaped haircut juts outward from his scalp, and his face carries stretched ears alongside a prominent nose. Pale, narrow eyes with grayish centers complete the look.
Toward Genos, the doctor behaves like a devoted father, dispensing hard-won advice and worrying constantly over the cyborg's safety. He repeatedly urges the young hero to avoid rash choices and insists that the two of them fight side by side. His concern is sharpened by memory, since in his own youth he chased justice with the same dangerous abandon he now sees in Genos, and he pours himself selflessly into building better upgrades even as age wears on him.
The webcomic overturns all of this. There he stands exposed as the true architect behind The Organization, a ruthless figure who fabricated Genos' tragic backstory, staged his own murder to stoke the boy's rage, and ordered machines to level entire cities in pursuit of destroying the world. Every act of kindness is revealed as calculated manipulation, and he is later shown to have made himself into the very Rampaging Cyborg Genos hunted all along.
Four years before the main story, the scientist was tracking the cyborg that had razed a certain town when he discovered its lone survivor, a boy pleading to be remade as a machine. He honored the request, and the rebuilt youth adopted the name Genos, vowing to hunt down the killer. The two spent years laboring together, the doctor claiming that the same rampaging machine had also slaughtered his own household.
He continually forges new components for Genos, refining the hero's frame after brutal fights and even donning a rocket-armed combat suit to reach him during the Monster Association crisis. His intellect alone produced the entire cyborg body, and he tends to every repair and improvement it undergoes. The webcomic strips this account bare, revealing the tragedy as invention meant to bind Genos to his cause, with both Genos and Drive Knight serving as his pawns.

Naruto vs Luffy with the twist nobody asked for: Luffy tickled Hinata on date night, and she kind of liked it. We break down the whole fight and commit to a winner....

There are no women on Namek. That isn't an oversight, it's the biology. Why we handed Piccolo the one thing his own species rules out, and why it had to be trap soul....
In the mainline manga, Dr. Kuseno appears as a devoted, fatherly scientist, but ONE's webcomic reveals a darker truth: he is the true architect behind The Organization, having manipulated Genos through a fabricated tragedy for his own ends.
Genos originally set out hunting the Rampaging Cyborg he believed destroyed his hometown and family, not realizing that the webcomic later reveals Dr. Kuseno himself to be tied to that very identity.
In the webcomic continuity, yes. Dr. Kuseno is eventually shown to have made himself into the Rampaging Cyborg that Genos had been hunting all along.
Yes, in the webcomic version of events, Dr. Kuseno staged his own murder to fuel Genos's rage and bind the young cyborg to his cause.
Dr. Kuseno is the elderly scientist in One Punch Man who rebuilt Genos as a cyborg and continues to maintain his body, initially presented as a kindly mentor devoted to justice.
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