Anri Chikura is a 16- to 17-year-old Yuusei Academy student, standing 166 cm tall and weighing between 48 and 54 kg. His birthday falls on January 6 or January 7, placing him under Capricorn or Aries, with blood type B. He possesses long silver hair, frequently styled with spiky bangs and an ahoge, complemented by gold or brown tareme-shaped eyes and glasses. His slim teenage build features small white wings on his back. These wings suggest a possible distant familial connection to Shou Hamura, Kai Misonou, and Kurisu Ousaka, indicating potential royal lineage from the Winfield Kingdom.

Raised by a single mother under financial strain, Anri nearly forwent higher education plans. He enrolled at Yuusei Academy as a scholarship student following an offer. Kind, energetic, and deredere in personality, he struggles academically. He speaks with a distinct habit of repeating words or phrases at least three times. Quiet and physically slight, he frequently experiences bullying, particularly from classmate Kyouhei Mitsugi. He finds solace in the brass band club, playing the flute.

His flute playing serves a significant functional purpose beyond music. It emits healing melodies capable of treating injuries, demonstrated when he tended to Shou Hamura's wounds in the OVA's first episode. The flute also repels monsters, driving away werewolves during the second episode. These abilities connect him to supernatural conflicts involving white-winged and black-winged factions.

He develops a friendship with Shou Hamura after Shou transfers to the academy. Anri participates in key events, encountering monsters linked to the Winfield Kingdom and witnessing escalating tensions between the winged factions. Despite his gentle nature, he becomes indirectly involved in the broader conflict through his support of Shou and his unique abilities. His background as a bullied scholarship student adds a layer of relatability amidst the fantastical elements.