The band originally consisted of vocalist and guitarist Juho "Jun-His" Vanhanen, drummer Jarkko "Korjak" Salo, guitarist Moit, keyboardist and percussionist Ville "Evil" Leppilahti, and bassist Toni "Ontto" Hietamäki.

Moit left the band in 2016 and was replaced by Niko "Ikon" Lehdontie of Kairon; IRSE!.

The band takes its name from "oranssi", the Finnish word for the color orange, and Pazuzu, a wind demon from Babylonian mythology.

[3] The band recorded their debut album, Muukalainen puhuu in 2008 in Korjak's family cabin.

The band's album Värähtelijä was released in 2016[3] and received positive reviews from music outlets such as AllMusic,[4] Pitchfork[5] and Spin.