Udonko Kondō, a Kameido High School student and school newspaper member, channels her relentless curiosity into pursuing the peculiar and overlooked, often sidelining ordinary concerns. Her investigative endeavors—like documenting the tennis club’s quirks instead of their sports routines—blend earnest inquiry with a knack for spotlighting the absurd.

Her older sister, Annenkov Kondō, defies expectations as a gyaru-styled exorcist, weaving Udonko into supernatural threads. This bond surfaces when Udonko shares eerie photos with classmate Yuri, later bridging Yuri’s encounter with Annenkov amid a paranormal crisis. The family’s udon shop, overseen by her grandfather, hints at a culinary heritage, though Udonko’s role there remains ambiguous.

Though her tunnel-vision focus on the unconventional sparks chaos—particularly in her well-intentioned tennis club interactions—Udonko’s presence as a secondary character anchors her identity: a curiosity-driven catalyst entwined with a lineage of unorthodox vocations.