Yukino Kannonji, hailed as the "Shining Black Orchid Princess" or simply "Princess," attends an elite academy as a third-year student. She leads an organization dedicated to propagating Japanese culture throughout the school. Without royal lineage, she earned her title through extraordinary beauty and virtuous conduct.

Her features include long, straight black hair in a classic hime cut with blunt bangs, sharp violet tsurime-shaped eyes, and a pale, slender physique standing 160 centimeters tall and weighing 43 kilograms. Her proportions measure 88-57-87 centimeters with an E-cup bust.

Publicly, Yukino embodies Yamato nadeshiko ideals through quiet refinement and dignity. Privately secretive, she masters traditional arts like koto, ikebana, naginata, and Japanese dance. Her personality blends old-fashioned values, kindness, patriotism, and a concealed perverse streak beneath her honorable facade.

Within the academy's social hierarchy, she ranks among three privileged princesses targeted by protagonist Chiba Kagetora. He exploits his unique physiology to compromise her, triggering extreme arousal and loss of self-control upon semen contact. This sparks intense conflict between her cultivated propriety and involuntary biological reactions.

Post-exposure hypersensitivity manifests in involuntary urination during orgasms. This physiological response accentuates the tension between her meticulously upheld image and forced submission to primal impulses.