Engineers

Engineers are big floating sacks of gas. They look a bit like Hanar, but they are different in many ways. Firstly, they are actually super-advanced robots that have learned free-will, independance and reproduction. In fact, they are so similar to a life form it is hard to tell the difference.

They love fixing things, even if it isn't broken. They were conscripted into the Covenant against their will but were later freed by the Humans and the Elites. Their tentacles can split off into tiny cilia to disassemble components and reassemble them in seconds.