Hibiki Lui

In 2011 the "Everyone's Vocaloid project" (みんなのボカロ計画 / Min-na no Bokaro Keikaku) contest was held. Entries from within Japan and overseas were allowed. In late May 2011, the contestants were picked out of the thousands of entries. This was one of two designs selected, they were announced at Vocaloid Festa 02.

Lui's release schedule was originally set to be Winter/Spring 2012. Prior to this, in Summer 2012, voice providers both male and female were being interviewed for a suitable voice. However, this has come to past, due to financial reasons for both Ring and Lui. The focus is now primarily Ring, with Lui's current development status being unknown.

The idea of Ring and Lui was to improve the Vocaloid culture by bridging the gap between fan concept and official products. Therefore, both were intended to be fan made designs for original Vocaloids that became official ones.

Like the Kagamines, he and Ring are based on "R and L".