He is Trashwaste, a villain who had his weapons taken away at one point. His shoulder mounted soundblaster was removed too, and he has a mechanical leg, gained in the Assembly Tower. The mechanical leg does not have any special add-ons, so it is only good for basic movements (like standing up, walking around in his cell, etc.). He has been arrested twice, first by Rocka, then by Greol.
Note: Feel free to use him anywhere you guys want. Feel free as well to give him new weapons, but make a link about here, in this section.