Following the brutal fighting of the Delaz Incident of 0083, the Earth Federation decided to form a special task force to suppress possible rebellions in space colonies. This new semi-autonomous force was known as the Titans. The RGM-79Q GM Quel, a refinement of the RGM-79N GM Custom, was chosen as their first mainstay mobile suit. It featured improved performance over the Custom, and its recognizable blue color scheme served to intimidate enemies of the Titans. However it was designed to fight inside colonies, not in the void of space. it was only assigned to Titans, and became their main stay mobile suits until the release of Hi-Zack and Marasai.