REOL (stylized as RΞOL) was a Japanese musical unit that consisted of vocalist/lyricist Reol, Vocaloid music arranger Giga, and movie director/producer Okiku. The members of REOL originally worked as solo artists, but they signed to Toy's Factory as a group in 2015, using Reol's name for the project. Prior to this unit's formation, Reol and Giga consistently worked together throughout Reol's solo career, eventually releasing an album together titled No Title. Their debut studio album as the unit REOL, Sigma, was released on October 19, 2016. The group disbanded in October 2017.
