Perseus Corporation

 was a front for the Perseus Corporeals who intended to convert all of humanity to Corporeals to serve the Ethereal.

Humans' first contact with Perseus came in 2019, when automated probes detected Perseus settlements on Jupiter's and Saturn's moons. (PROSE: The Ethereal)

Perseus was involved in several projects on Earth, including Peacekeepers (PROSE: Thinking Warrior) and the Household Assistance Devices. (PROSE: Anteus)

Perseus Dynamics was a subsidiary of the Perseus Corporation. (PROSE: Thinking Warrior)

In 2040, after several encounters with Perseus throughout his lifetime, the Eighth Doctor was instrumental in defeating Perseus. (PROSE: The Ethereal)