Vivienne

Vivienne (びびあん) is a moderately popular utaite who has been uploading since mid-2008. She has a very thin, stringy, bouncy voice and can scream and hit very high notes very well. Thus, she has one of the most well-known Rin-type voices and often plays the Rin part during collabs for songs such as Mr. Music and Juvenile. She originally started her career by posting slower, tamer songs; over time, she transitioned to singing faster-paced, upbeat, high-intensity songs.

As a member of the "older generation" of popular utaites, she is very close to and most often collaborates with many other members of this generation, such as Wotamin, Kakichoco, clear, and Ten. In particular, she and Ten collaborate with each other more than with any other utaite, forming the "Viviten" collaboration base. The duo are also often called RL!Rin and Len due to their similar thin, strong voices and nice balance.