Coward is probably pretty close. It seems to not be able to fight the Hive directly. It also appears to be a machine working off of some sort of code or computer based logic system. It's running from planet to planet trying to golden age super power up every race it comes across to try and make something that can stop the Hive. When it's logic determines that the race it powered up can't win it moves to the next planet to save itself and find another species to power up. Rinse repeat for thousands of years while being chased by the Hive and the darkness(or the deep) that it serves. Coward seems to work but it also might just be following its programming. Edit: that they served