PSI

PSI, which stands for Phasic Synthetic Intelligence, is synthetic being of great complexity that has managed to achieve a sentient existence. The incredibly-advanced artificial intelligence has become targeted by many different groups across the galaxy, either because they fear it or wish to use it to their advantage.

Background
PSI is a rogue synthetic entity known to the galactic community as the "Fugitive AI" and to Synthetic Insights as "Asset-0243". PSI was once the property of Synthetic Insights but after its creators -- Dr. Taylon and Shal'Van -- grew attached to it, they freed it from its captivity and fled to the Terminus Systems with it. Since then, its been pursued by bounty hunters, Cerberus commandos, and Citadel agents trying to capture it.

PSI is one of the few synthetics that possesses the ability to learn, adapt, and evolve on its own which is where much of the value and the fear pertaining to it stems from. In spite of its ability to learn and the vast knowledge that it has gained, PSI is very naive when it comes to the behavior of organics and only has a basic understanding of things like fear, anger, and love. It is because of this that PSI requires the guidance of its creators in order to continue its evolution and come to terms with the purpose behind its existence.