Koneko functions as the Hamatora detective agency’s receptionist and primary contract negotiator, coordinating job assignments and dispatching agents from her base at Cafe Nowhere. There, she collaborates with Master, frequently tending to bar duties like glass polishing while monitoring client communications. Though rarely engaged in fieldwork, she participates in situational operations, including a hot springs mission where she aided colleagues against thieves manipulated by a Minimum Holder.

Her appearance features auburn hair tied in a ponytail, golden eyes accentuated by red-framed glasses, and a tan-and-yellow professional ensemble. A distinctive cat tail—unexplained but fitting her name’s "kitten" translation—completes her look. Her past traces to childhood experimentation under Facultas, a clandestine group, before Master rescued and mentored her as a cafe waitress. These experiences forged her practical demeanor and diligent approach to duty.

Professionally meticulous and ethically driven, she openly disputes Moral’s extremist egalitarian philosophy, rejecting his violent tactics despite their ideological veneer. This underscores her prioritization of tangible ethics over theoretical absolutes. A covert skill involves maneuvering through ventilation systems, a method inherited from her grandmother’s teachings, utilized tactically during operations.

Though her exact age is unspecified, her capacity to perceive Moral’s subliminal auditory cues implies she remains under 15 during the series’ events.