Aoi Tategami, known as Cure Gelato, is a 14-year-old second-year student at Ichigozaka Middle School, born August 27th under the Virgo sign. Heiress to the prestigious Tategami Corporate empire, she is frequently attended by her butler, Mizushima Mitsuyoshi. Mitsuyoshi, taken in by the family as a child and later named heir, initially forbade her rock pursuits but became a supporter after seeing her dedication. Aoi possesses bright blue eyes and dark blue hair styled in a thick ponytail secured by a yellow ribbon, notable for her visible fanged teeth. Her civilian style features a white raglan top, light blue mini-skirt, dark blue leather jacket with gold crown pin, and black-and-white sneakers with blue thigh-high stockings. Summer sees her in a light blue shoulder-cutout T-shirt and denim shorts; winter in a sky blue hoodie and gray pleated skirt. As an adult, her hair lengthens and her attire includes a ruffled side scarf, red choker, black crop top, and white boots.

Enthusiastic, bold, and freedom-loving, Aoi embodies a brave, passionate spirit likened to a lion. She chafes against her household's strict rules demanding refined behavior and initially grapples with a competitive streak hindering her acceptance of failure. She evolves to embrace her "hard and chewy" nature, mellowing while forging her unique musical style. Discovered busking by Sonobe Kei, she became the vocalist and guitarist for the rock band Wild Azur, a name reflecting her blue theme color and spirited personality. Key bonds include Ichika Usami, who admires her musical talent, and Himari Arisugawa, a friend despite contrasting natures. Aoi idolizes singer Ayane Misaki, whose performance ignited her passion for music; she vows to surpass Ayane, challenging her to a duel. Her Wild Azur bandmates—Kei, Ryuuta Yokogawa, and Sara Asaka—share her musical drive, with Kei eventually passing leadership to her.

Aoi's sheltered childhood under the Tategami Corporate's rigid routines transformed after witnessing Ayane Misaki perform, sparking a desire for freedom that led her to busk. There, Kei invited her to join his nascent band. Her journey as Cure Gelato began during a Battle of the Bands competition: protecting a lion-faced ice cream treat from the Kirakiraru Thief Hotto, her fierce determination caused the treat to transform into an Animal Sweet and Sweets Pact, enabling her transformation. As Cure Gelato, she wields ice-based powers and a sonic roar, with attacks like "Gelato Shake" and group techniques "Animal Go Round!" and "Fantastic Animale". Significant development includes reconciling with Mitsuyoshi, who once dragged her from a concert but later acknowledged her talent after seeing her perform. Another arc involves her temporary transformation into Dark Gelato when Wild Azur was overshadowed at the Blue Rock Festival, causing her to lose faith until friends restored her confidence, renewing her resolve to challenge Ayane. Her adult self achieves success as a musician.

Cure Gelato's design fuses ice cream and lion motifs: her hair brightens and thickens into a mane-like ponytail, gaining lion ears and a tail. She wears a metallic indigo top with a white fluffy collar, an ice-cream-cone-patterned skirt, gold crown earrings, and a choker. Her Super Cure Gelato form features lighter colors and wings; her A La Mode Style adds a pale blue hood, cape-like fabric, and asymmetrical boots. Transformation phrases include "Cure La Mode・Decoration!" and her introduction: "With freedom and passion! Let's・La・Mix It All Up! Cure Gelato! Ready to Serve!". Her name reflects her themes: "Tategami" combines "stand" and "god" meaning "spirit" or "mane," "Aoi" means "blue," and "Gelato" is Italian for ice cream. She is the franchise's first character with fanged teeth and the fifth Cure with a non-English name.