Who was primarily used as spies in the byzantine empire?

In the Byzantine Empire, espionage was often conducted by a variety of individuals, but women and eunuchs were primarily used as spies. Women, due to their societal roles and ability to move freely in domestic spaces, could gather intelligence discreetly. Eunuchs, who often held positions of trust within the imperial court, could access sensitive information and communicate between different factions. Both groups played crucial roles in the intricate networks of information that were vital for the empire's political and military strategies.