House Arpexia was an Oldblood House committed to reason, science and a belief in objective truth, even under War-time conditions.
Arpexia was engaged in a rivalry with House Xianthellipse. It excelled at the production of technical devices such as experimental models of timeship.
Members of House Arpexia were more sensitive to some stimuli than other Houses. They often had night-vision, a strong sense of magnetism, and hallucinatory hysterical episodes.
During the War, Arpexia rose to become one of the six ruling Houses. (PROSE: The Book of the War).