Kamakyuri

Kamakyuri is part of the elite monster group called the “Elite Forces for the Extermination of the Former Human Race”, engineered under the orders of Genus-hakase.

Within this group, he is deployed as the vanguard, leading an assault on Saitama’s home.

Kamakyuri has the body of a humanoid mantis with a grotesque twist.

His most striking feature is his head, which has its brain completely exposed, giving him a disturbing and experimental look that reflects his artificial origin.

Very little is shown of Kamakyuri’s personality due to his extremely short screen time.

However, his willingness to attack Saitama’s home as part of a hunting squad suggests a loyal, mission-focused monster who follows Genus-hakase’s commands.

Kamakyuri is identified as a monster with an unknown disaster level.

His design and role imply enhanced physical abilities and combat readiness, but his true power is never displayed.

Because he is defeated before he can act or even introduce himself, no specific techniques, speed, or durability feats are revealed.

He is implied to be dangerous enough for Genus-hakase to include in an elite strike force, but not remotely comparable to Saitama.

Kamakyuri is sent, along with other monsters, to capture Saitama on the orders of Genus-hakase.

Acting as the first attacker, he infiltrates Saitama’s apartment and initiates the assault by breaching the ceiling.

This backfires immediately.

The destruction of his ceiling enrages Saitama, who reacts so quickly and decisively that Kamakyuri is defeated before he can even state his name or boast about his purpose.

Kamakyuri’s role is therefore brief but memorable: he serves as a darkly comedic example of how overconfident or overdesigned monsters are casually eliminated by Saitama.

His instant defeat emphasizes both Saitama’s overwhelming power and the futility of Genus-hakase’s early plans.

Genus-hakase

Kamakyuri is one of the creations or controlled assets of Genus-hakase, the scientist behind the House of Evolution.

He follows Genus-hakase’s directive to capture Saitama, functioning as a disposable yet “elite” soldier in the doctor’s anti-human, anti-hero agenda.

Saitama

Kamakyuri is an enemy of Saitama, though the conflict is hilariously one-sided.

His attempt to attack Saitama at home ends with him being instantly taken out, becoming another nameless casualty of Saitama’s casual strength.