Karauri, a demon of the imp race, maintains a youthful, childlike appearance despite his adult status. Standing 140 cm tall with sensitive skin requiring breathable cotton garments, his name derives from a linguistic play on "cucumber," consistent with the series’ nomenclature. Serving in Hell’s bureaucracy, he operates as the rational counterbalance to his eccentric colleague Nasubi, their dynamic defined by exasperated yet brotherly camaraderie. Though he respects Nasubi’s artistic talents, Karauri admits limited comprehension of their superior’s creative vision.

Driven by professional ambition, he seeks transfer to Shugou Hell, motivated by an infatuation with Oko, chief assistant of Mortal Hell. He perceives her as a figure of sophisticated elegance, reacting with flustered blushes and dreamy murmurs when she shows leniency, such as excusing a shared mistake with Nasubi. His admiration includes subtle physical appreciation, a trait Nasubi openly teases.

Karauri exhibits earnest admiration toward superiors, including a protagonist who mentors him as an equal despite hierarchy. Accompanying this superior on assignments fosters mutual respect, though he displays reverent awe around higher-ranking figures. Known for reliability and pragmatism, he prioritizes duty unless derailed by Nasubi’s antics. While generally composed, he reveals vulnerability in romantic contexts and holds a nuanced view on punitive practices, quietly speculating that some subjects might find enjoyment in punishments involving attractive enforcers.