Kiyotaka Ayanokōji attends Tokyo Metropolitan Advanced Nurturing School, deliberately placed in Class 1-D through calculated average entrance exam scores. His physical presence includes a lean build, brown hair, brown eyes, and fair complexion at 176 cm tall. Conventionally attractive and ranked fifth in popularity among first-year males, he maintains an indifferent expression despite a well-developed muscular physique forged by intensive childhood training. His origins lie in the clandestine White Room, a facility engineered by his father Atsuomi Ayanokōji to produce exceptional individuals through rigorous education. Demonstrating advanced cognition from age two, he solved complex arithmetic rapidly and mastered multiple writing systems by four. By nine, he defeated trained mercenaries and achieved college-level academic proficiency. As the sole successful graduate of the White Room’s fourth generation, he fled with his butler Matsuo’s aid, seeking sanctuary at the school to evade his father. Ayanokōji’s personality reflects emotional detachment and strategic pragmatism. He views humans as "tools" for victory, a mindset ingrained in the White Room, and actively conceals his capabilities behind an unremarkable facade. This includes crediting others for his achievements—such as attributing procured test questions to Kikyō Kushida or Ken Sudō’s expulsion intervention to Suzune Horikita. Socially awkward, he communicates monotonously and struggles with connections, yet sustains dialogues with acquaintances like Kushida. Despite his utilitarian outlook, he exhibits nuanced contradictions. He honors promises, aiding Airi Sakura against a stalker, and sacrifices private points to prevent Sudō’s expulsion. He identifies Honami Ichinose as a friend during her distress. His internal monologue clashes with actions implying concern, like comforting Kei Karuizawa after orchestrating her torment to manipulate her dependence—revealing a conflict between conditioned ruthlessness and latent desire for normalcy. When provoked, he displays fierce assertiveness, confronting teacher Sae Chabashira with threats after her demand to advance Class D. He reacts violently to injustices against those he shields, attacking Kakeru Ryūen for bullying Karuizawa. His strategic brilliance exploits school rules, bribing upperclassmen for exams or negotiating with teachers. He consistently outmaneuvers rivals like Ryūen through psychological manipulation and meticulous planning. Subtle evolution marks his school tenure. Initially adopting an "average" persona for ordinary experiences, Chabashira’s ultimatum forces him to deploy White Room tactics for class advancement. His popularity rises after outperforming student council president Manabu Horikita in a race, fostering broader social integration. By his second year, he combats White Room operatives dispatched to expel him, signaling persistent external threats. His narration introspects on whether his instrumental view of others can shift, hinting at gradual emotional change.