Shishi loves fabricating things, he enjoys the process immensely, but everything should have a purpose. In the case of the Droids they are a test beds for his own ideas on Droid design. He needed some help around the workshop so made these 3, then when things went south again he decided to reprogram them to provide some extra protection. They He made them some simple slug pistols, found a few hefty wrenches, added a couple extra plates to their chassis. They have simple target selection protocols which apply to both pistols and vehicle weapons, but mostly they just get between him and anyone trying to hurt him.
One in particular has taken this protection a little bit too seriously, it regularly ignores Shishi to ensure the Gossam creator is safe, often doing a rather good job even if it gets more injuries along the way.
