Azusa Miura occupies the role of eldest idol, naturally assuming a nurturing "big sister" position within her group. Her career began shortly after junior college graduation, driven by a wish to attract a fated individual through her public persona. Despite her outwardly calm and leisurely demeanor, she reveals a propensity for flustering under pressure, particularly when hurried, exposed to spicy cuisine, or enduring motion sickness. A chronic lack of directional sense plagues her, rendering navigation tools ineffective unless accompanied by her canine companion Toratan, who inexplicably guides her true.

Her hobbies encompass conducting fortune-telling sessions for peers and indulging in television dramas and magazine reads. Familial bonds remain strong, especially with her mother, though their relationship occasionally strains over critiques regarding her dependence on family support. Childhood friend Tomomi serves as a trusted confidant through regular phone exchanges. Alternate storylines reimagine her as a tactical leader wielding combat expertise, balancing authority with her inherent maternal warmth.

Standing at 168 cm, her appearance fluctuates across media with hair shades oscillating between black, blue, and purple, always crowned by a signature sickle-shaped cowlick. Light blue and teal dominate her wardrobe, typically paired with a vanilla-hued skirt and brown footwear. Notable quirks include unexplained mastery of joint locks and a transient cohabitation period with associate Chihaya. Narrative threads weave subtle destiny motifs through elements like a bridal-themed crossover appearance and historical warrior references in collectible cards, collectively framing her as a figure balancing whimsy with latent resolve and enigmatic depth.