There is more than one artist under this name:

1. A Japanese Visual Kei band
2. California funk musician Darron Bergdorf
3. Uncredited Videogame Score Composer
4. Underground rapper from Erskine, Scotland.

1. D is a Japanese visual kei band formed in March 2003 by vocalist ASAGI (ex-Balsamic, JE*REVIENS, Ｓｙｎｄｒｏｍｅ), guitarist Ruiza (ex-Distray, LAYBIAL, Ｓｙｎｄｒｏｍｅ, ) and guitarist SIN (ex-WITH SEXY, Vasalla), former members of Syndrome.