From a dynamic forward-leaning pose, Sasaki Kotone stands on a translucent teal base that hints at magical energy. Her signature outfit is a crisp white dress with pale pink accents and star-lace detailing along the hem. The sculpt captures her slender silhouette and the gentle folds of fabric, with subtle shading to enhance depth. Her long hair flows behind her in a soft gradient, with pink-tinted tips and tiny ribbons that flutter as if caught in an unseen breeze. She holds a wand accessory with a clear crystal tip, while a small, magnetically attached charm hovers near her other hand. The paint finish uses a pearlescent white and glossy pinks to evoke a pure aura, with precise linework on the eyes, a delicate blush on the cheeks, and metallic accents on the belt buckle. The overall presentation conveys both purity and action, inviting fans to imagine a rescue scene where Kotone casts a bright, cleansing spell.

Within the story, Sasaki Kotone is a high school student who discovers an ancient relic during a festival that grants her pure-hearted powers to cleanse corruption threatening her city. Guided by a mentor and supported by a small circle of allies, she learns to balance ordinary life with the responsibilities of a magical alter ego. Kotone's journey centers on purification, protection, and restraint—she fights without harming innocents and strives to keep her powers from overwhelming her. The symbol of white fabric and soft pink accents on her costume reflects her belief that kindness and courage can overcome darkness. As the series unfolds, Kotone grapples with self-doubt, learns to channel energy more precisely, and grows into a courageous leader who inspires others to believe in the light, even when victories are hard won.