House Arpexia

 was an Oldblood House committed to reason, science, and a belief in objective truth, even after all other Houses had abandoned the concepts. It became one of the six ruling Houses during the War, and it was part of the House Military.

Arpexia was better than any other bloodline at producing deep-time strategies and technical devices such as experimental models of timeship and weapons systems like the babels; they were famous for their bottomless armoury. Arpexia's closest equal and strongest rival was House Xianthellipse.

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. (PROSE: The Book of the War)