Amaha Shiratori is a third-year student at Marehoshi Private Girls' Academy's main branch and holds the center position in the idol unit TROIS ANGES. Her defining feature is the "Angel's Voice," celebrated for its crystalline clarity and pure resonance. She possesses long, slightly curled pale wheat-colored hair, arranged with a prominent braided section secured by a white ribbon atop her head and smaller braids trailing down the right side. Her eyes are a deep dark blue. In casual settings, she favors soft-hued clothing with delicate frills. For TROIS ANGES performances, she wears an intricate costume: a white top accented with sky blue details and gold straps, layered ruffled off-the-shoulder fabric, and a pleated skirt embellished with gold designs. The ensemble includes white boots adorned with sky blue lines and gold straps, white stockings, and a wing-inspired hair accessory.

Innocent and unworldly due to a sheltered upbringing in affluence, Amaha radiates pure-heartedness, devoid of comprehension toward negativity or malice. She exhibits consistent kindness and altruism, driven by an earnest desire to assist those in distress. Her preferences include bears, while she acknowledges no dislikes, reinforcing her gentle and uncomplicated disposition. Though her protected background fosters naivety, she approaches all interactions and idol endeavors with unwavering sincerity.

Her surname "Shiratori" means "white bird," and her given name "Amaha" blends the characters for "heaven/sky" (天) and "leaf" (葉).