Rumia Uru fulfills the role of Election Committee member at Hyakkaou Private Academy, overseeing gambling matches during the student council presidential election to enforce rules and guarantee impartiality. She possesses black, messy wavy hair, heavy-lidded violet eyes, and a perpetually sleepy expression. Her attire consists of a penguin-themed orange kigurumi hoodie worn over the standard female academy uniform, paired with light purple nail polish. Her outward demeanor is dreamy and polite, often elongating vowels when speaking, contributing to an airheaded impression. Criticism, such as Ibara Obami labeling her voice annoying, leaves her unfazed; she calmly acknowledges such remarks as frequent. Beneath this placid exterior lies a distinct enthusiasm for conflict among gamblers. She finds thrill in high-stakes scenarios and the psychological dynamics they expose, particularly enjoying observing gamblers confront lessons about trust, as seen during the Greater Good Game. Within the election arc, Rumia served as impartial referee for the Greater Good Game involving participants including Yumeko Jabami and Terano Totobami. Her duties encompassed explaining game rules, guiding players to designated rooms, announcing round results, and enforcing time limits by ringing a bell. She facilitated critical decisions, such as expelling Miroslava Honebami following a majority vote. Post-game, she distributed votes as prizes and permitted third-party bets between Terano Totobami and Itsuki Sumeragi. Rumia also participated in logistical election activities, overseeing the transport of Yumeko Jabami’s three billion yen into a theater hall. She monitored Ibara Obami’s sale of "Scumcoins" for Rin Obami, commenting positively on Ibara’s supportive behavior despite potential ethical ambiguities. While eating ice cream during this duty, she noted the Scumcoin sale did not explicitly violate election rules. Her surname Uru (宇留) combines characters meaning "eaves/roof/heaven" and "detain/halt." Her given name Rumia (瑠美亜) incorporates meanings for "precious stone/gem," "beautiful," and "second/Asia." Her documented role remains confined to election oversight duties.