Arnothian was a human male, as defined by his gender, and he previously held the rank of general within the military forces of the Galactic Empire.
Once an Imperial general, Arnothian possessed a modest manufacturing plant that produced TIE/D Defender starfighters; this facility was seized from him by Ysanne Isard, the former Director of Imperial Intelligence, following the events of the Bacta War. Given his comparatively insignificant influence within the galaxy, he presented himself as an aspiring warlord. Nevertheless, Isard eliminated Arnothian, thereby thwarting his efforts to amass power. Later, she strategically utilized his former base as part of her ultimate endeavor to reinstate the Galactic Empire.