Kyouhukou manifests as a thirty-centimeter-tall humanoid cockroach standing upright with its head facing forward. Adorned in a bright red cape detailed with golden threads and a small golden crown, it carries a scepter tipped with a pure white gem, creating a regal, noble-like appearance that deliberately contrasts its insectoid form. It speaks with polite formality, utilizing refined language reflective of its self-perception as a noble gentleman, a demeanor maintained even during acts of intimidation or punishment. It demonstrates reason in specific contexts, such as aiding lost beings like Hamsuke by directing its minions. Its primary ability involves summoning vast swarms of cockroaches, ranging from thousands to hundreds of thousands, varying dramatically in size with some specimens reaching one hundred fifty centimeters long. These swarms overwhelm targets through sheer numbers, inducing extreme physiological disgust rather than causing direct physical harm. This ability proves most effective within enclosed spaces where escape is impossible, exemplified by its domain, the Black Capsule room on Nazarick's 2nd Floor, specifically designed to trap victims. The psychological impact is severe enough to break even hardened individuals, as demonstrated during the torture of the Eight Fingers criminal group. Within Nazarick, Kyouhukou serves as the Area Guardian of the Black Capsule and is classified among the "Five Worst" entities due to its horrifying dwelling. Its creator is identified as Luci★Fer in the Web Novel. During its implementation in Yggdrasil, twenty-eight out of forty-one guild members expressed intense disgust toward its design. It maintains a friendship with Cocytus and is acknowledged by Ainz Ooal Gown for its knowledge of noble etiquette and dancing skills. Despite its courteous speech, other residents like Shalltear Bloodfallen and Albedo actively avoid it due to its appearance and abilities. Entoma Vasilissa Zeta frequently consumes its summoned cockroaches, whom Kyouhukou views as family, leading it to fear her as the "Predator of Family". In Isekai Quartet 2, it oversees detention for Kazuma, Aqua, Grantz, Koening, and Neumann following their attempted theft from the principal. The nature of its punishment induces profound horror in the detained students; even Darkness, who typically enjoys pain and humiliation, reacts with visceral dread. Kyouhukou's presence alone unsettles other villainous characters from the Overlord series, reinforcing its reputation for psychological terror.