Jirokichi, one of six supernatural children inhabiting the Hiiragi family's ancestral wardrobe, serves as a spirit bound to aid the household's current mistress. Designated the safety specialist among his fellow wardrobe dwellers, his mountaineer or archaeologist-like appearance distinguishes him from spirits fulfilling other domestic roles. His duties focus exclusively on maintaining safety within the home. The collective emerges to guide Noel Hiiragi toward a responsible, structured domestic life, teaching essential household management skills until they judge her sufficiently independent.