Dio – Distraught Overlord (ディオ –DISTRAUGHT OVERLORD–) was a Japanese visual kei metal band from Tokyo, formed on 14 May 2006.

Rather than following the usual sound of visual kei, they were a darker, heavier band, which combined metal with melodious tones.

[1] Guitarist Erina left the group in September 2009 and they went on hiatus, until announcing that they were officially disbanding on 13 March 2010 and that the same line-up would reform as a new band.

[2] That same month, vocalist Mikaru started a project called Digras; its other members have not been announced yet.

In July, Mikaru and drummer Denka (now going by Syu) formed the band Black Line, and Erina is in VII-Sense.