CUL was a model designed for the show VOCALO Revolution, organized by Hiroto-P. She used the Vocaloid VY1's voice to sing songs, and was featured on the show in a beginning, ending, and presentation PV. The character design is by Lat. She will make a real Vocaloid with the release of Vocaloid3.
A related model named REV has the same premise and uses VY2's voice.
On June 8 2011, Yamaha announced that CUL would be a real Vocaloid with the voice provider Eri Kitamura. The publisher will be INTERNET Co.,Ltd.
This is the first known model by LAT that may not be redistributed upon modification. Modification is only allowed in terms of improving the appearance or changing colors for personal use, however, she must not be modified into entirely different character nor are parts allowed to be used on other models.