System is the supercomputer on The Waystation. She has no true physical form as she's a sentient supercomputer. She's the living embodiment of what the Internet is on Earth, only on a much grander scale. But she will take on a holographic image of a humanoid female if the need arises. She doesn't "speak" like a human does, rather her voice travels through the air around those she's conversing to. When she speaks, it's calm. Analytical, but not unemotional. Very gentle sounding, almost ethereal.