Niberune is a character from the anime I Left My A-Rank Party to Help My Former Students Reach the Dungeon Depths! She is introduced as a mysterious girl who harbors within her heart a person once known as the Golden Priestess. She is discovered and taken into care in the royal capital of Glad Shi-im, which the party Clover arrives at while challenging a figure named Arata. She is also described as the princess of the city of dusk, Glad Siim. Niberune eventually joins the party Clover, becoming a supporting member. Her motivations and background are closely tied to her connection with the Golden Priestess, lending her an air of mystery. Specific details about her personality, notable abilities, and personal development are not extensively documented in widely available sources, and her role centers on her mysterious origins and her integration into the party's journey.