Yuma Suzuki attends Yamasaki Academy as a high school student, distinguished by her dyed blonde hair and vivid blue eyes. She stands 1.65 meters tall, weighs 47 kilograms, and has body measurements of 80-56-84. Her blood type is O, and she is a Taurus.

Friends with Eriko Takahashi since junior high, Yuma initially clashed with her before their bond deepened into closeness. She shines in athletics yet falters academically, habitually cheating on exams despite consistently poor results. Quick-tempered and sometimes impulsive, Yuma nonetheless eagerly joins in on fun. Her trademark twin-tails, fastened with hair bobbles, accentuate her style.

As the eldest of three sisters, Yuma shares a tense dynamic with her youngest sibling, Momoka Suzuki. Yuma's overprotectiveness once made Momoka feel incapable, driving Momoka to reject attending the same school. Though antagonistic, unspoken care lingers—Momoka misses Yuma during separations, and Yuma reciprocates the concern. Their rapport warms after Momoka befriends Yuma's circle and addresses her own emotions.

Yuma regularly collaborates with Eriko on schemes and activities within their group. Outside school attire, she favors leg warmers and plaid patterns in her casual wear.