Runa Yomozuki, a third-year student at Hyakkaou Private Academy, holds dual influence as a Student Council stalwart and head of the Election Committee. Tasked with officiating high-stakes electoral gambles, she champions neutrality yet subtly bends her impartiality when clashes involve the Momobami dynasty or council infighting. Her diminutive 130 cm frame contrasts with striking features: long platinum hair cascading over short bangs, vivid purple eyes, and an ever-present orange rabbit hoodie layered atop her uniform. Rarely seen without pastel lollipops or handheld games, she idly clicks buttons during meetings, projecting a facade of playful nonchalance. Beneath her bubbly charm lies a streak of merciless pragmatism. She grins through public broadcasts, taunting peers like Mary Saotome over humiliating fates or coldly ignoring Midari Ikishima’s self-destructive antics. Yet she ruthlessly polices gambling integrity, halting cheats in Nim Type Zero and Tarot matches with icy precision. A covert architect of balance, Runa destabilizes rival factions through calculated schemes. She anonymously leaked Yumemi Yumemite’s shredded fan letter to Yumeko Jabami, crippling both Kaede Manyuda’s ambitions and Yumemi’s career in one stroke. Her loyalty tilts toward the Momobami twins, aiding Kirari’s authority by feeding Ririka intel and engineering systems like the Votes Auction to uphold council dominance. In *Kakegurui Twin*, her camaraderie with Aoi Mibuomi masks surveillance of rising gamblers like Mary, while *Kakegurui (Kakkokari)* hints at insecurities when junior councilors mock her childlike stature. Live-action renditions mirror her duality—whimsy laced with calculation. From moderating election broadcasts to unmasking Rin Obami’s rigged gamble, Runa crafts labyrinthine rulesets, adapting seamlessly to crises like Yumemi’s idol showdown. Each move threads strategic foresight with mischievous unpredictability, cementing her as Hyakkaou’s enigmatic linchpin, eternally dancing between order and chaos.