双音レンジ
An UTAUloid character.
双音 (Soune: Paired Sound) - Pertains to a formerly packaged voice together with Ria. They are not related to Soune Taya in any way. Put together, their name is a pun of the word "Rearrange." This partnership has since been disbanded.
Though the katakana spells "Renji", his name is officially written in Romaji as Renzi.