During the transition period between "Anzai Rara" leaving S1 and rebranding as "RION," the secondary distribution label Wing (often a sub-label of Wanz Factory or KM Produce ) released "Best Of" compilations. These discs used the imagery but the metadata listed "Anzai Rara" as the performer, with "RION" as the alias.

Utsunomiya Shion, a name that may not be immediately recognizable to everyone, but one that has made significant waves in the Japanese entertainment industry, particularly in the realm of voice acting and music. Born on December 20, 1985, Shion has led a multifaceted career, not only captivating audiences with her voice acting skills but also charming them with her singing talents. Under various names and aliases, including Anzai Rara and RION - Wing, she has demonstrated her versatility and range, making her a beloved figure among fans of Japanese pop culture.

Fans of the genre argue that "Wing" is not just a label but a style . The Wing production philosophy emphasized "Authentic Vulnerability"—scenes with natural lighting, minimal cuts, and genuine conversational chemistry. Utsunomiya Shion (as herself) leaned into this. Anzai Rara (the idol) fought against it. RION (the minimalist) perfected it.