Aira Harune was born on September 3, 1997, in Yokohama, Japan. She lives with her father Hiroshi, mother Omi (a former Prism Stylist), younger brother Itsuki, and twin sisters Eru and Uru. She has red-orange hair and auburn eyes, and her height grows from 165 cm to 170 cm. Initially a clumsy, accident-prone, and self-doubting teenager, she possesses a natural talent for fashion coordination and the unique ability to hear the voices of clothes, allowing her to perform Pretty Remakes. After being scouted by Jun Takigawa and debuting as an untrained substitute for Mion Takamine, she discovers Prism Shows, where figure skating, dance, and couture combine. She forms the idol unit MARs alongside Rizumu Amamiya and Mion Takamine. Through rigorous training, she overcomes her awkwardness, masters Prism Jumps such as Fresh Fruits Basket, Lovely Rainbow, and Miss Fairy Girl, and eventually achieves the legendary Aurora Rising Dream jump to win the Prism Queen title. Her father initially opposes her ambitions out of protectiveness, but a pivotal performance in a redesigned dress he gave her sways him. She develops romantic feelings for Shou, the lead singer of Callings and a designer for Prism Stone. Their bond includes a forehead kiss, a fireworks festival date, and Shou giving her the protective Wedding Teardrop necklace, though their idol careers delay an official commitment. In Pretty Rhythm Dear My Future, she becomes vulnerable to manipulation by Don Bonby, who brainwashes her using a Symphonia Stone, turning her into Dark Aira; she is saved by Shou and her friends. Later, she relocates to New York with Shou to pursue fashion design. Her catchphrase is Happy Lucky! She also appears as a legendary Prism Star in Gekijō-ban PriPara Mi~nna Atsumare! Prism Tours, mentoring others and performing with the Saints unit. In the Kiratto Pri☆Chan universe, a parallel iteration named Aira Nanahoshi works as a designer, co-creates the brand Sweet Honey, and mentors the idol Anju Shiratori.