An Essence Module, or Pod, is a small personal life support bubble and interface system capable of sustaining an individual for an extended period of time. Essences are owned by most upper-class travelers, and have recently been standardized across the Keeper military, though some units are still awaiting the hardware to facilitate this transition. The Essence can harbor a number of useful systems such as Auras, as well as provide a comfortable resting place on long journeys and serve as a portable personal environment. The pods can be linked together to allow for perfect simulations of their vehicles (in what are called ART-or Aura Realized Training-programs). This has obvious military application, but also allows for civilian training and practice that would waste resources otherwise, as well as enabling diagnostics of a vehicle’s condition. One of the main advantages of the Essence Module is that it can be seamlessly swapped between any Essence-compatible vehicles, even if they are of radically different configurations.
The Essence Module runs off a radiothermal power grid and can protect its occupant from over 1,000 degrees centigrade of temperature variation, most pressure damage, airborne toxins, and lethal doses of radiation. It can even absord a decent amount of physical damage before its seal is breached. Most compatible craft feature a system for ejecting the Essence Module in emergency situations.