Soraha Amano, a 16-year-old student at Yurigaoka Girls' Academy, captains Legion Álfheimr after serving as vice-captain under the first-generation leader, Takegoshi Chihana. She possesses world-renowned physical abilities and exceptional combat skills, which were instrumental in establishing Álfheimr's reputation as the strongest legion during its formation. Her combat experience includes the Odaiba Counteroffensive, where she delivered the decisive blow against a nestless Ultra-class Huge while serving in the Second Division.

Following the disbandment of the first Legion Álfheimr after the Odaiba Counteroffensive, Soraha lost motivation to continue as a Lily, considering retirement or transferring schools. This changed when she encountered the withdrawn Egawa Kusumi, who had been rejected by peers. Witnessing Kusumi's vulnerability inspired Soraha to remain at Yurigaoka and rebuild Legion Álfheimr as its new captain. She formalized this commitment by taking the Schutzengel's Oath with Kusumi, establishing them as a protective pair; Kusumi serves as her Schild, while Maki Wakana previously fulfilled the role of her Schutzengel.

Bright and cheerful, Soraha often uplifts those around her. She maintains a strong appetite without food preferences but harbors a fear of bees. She shares a dormitory with Ena Banshōya and considers Chihana Takegoshi her best friend.

Her surname "Amano" combines the characters for "heaven/sky" (天) and "field/wilderness" (野), while her given name "Soraha" blends "heaven/sky" (天) and "leaf" (葉). She is 158 cm tall, weighs 50 kg, has blonde hair and blue eyes, a birthday on October 27, and blood type O.