In episode 6 of Spartan Ops a Covenant vehicle shows up, named the Harvester. There has been much debate over this before, but now we can say that it is indeed a Covenant vehicle. But, is it actually their own design?
The major thing that tips us off is the fact that it’s mostly devoid of hexagons. This could be just a design change, if it weren’t for the fact that hexagons are used to make up the floor (I’m not convinced the Covenant put those their, either). It isn’t made out of any metal we’ve seen the Covenant use before, and the flooring is made of Forerunner metal. Something strange is going on, the only thing that is definitely Covenant in this things is the crates and the Lekgolo worms that are controlling it.
In order for the Covenant to make something like this, they’d need a lot more resources then they currently have. It wouldn’t make sense to use an all new type of material when you have a good amount of the metal you’re already using at your disposal.
My theory is that they simply found it and used Lekgolo to take control of it. I have no idea who built it though, considering it has Forerunner metal for the floor and a few other things, but some type of other material, which may be organic, making up the rest. All I know is that it doesn’t seem to be Covenant, and it was most likely found on Requiem. Either way, there’s more to this then we’ve been told so far.
EDIT: I had some more revelations.
If you look near the Harveter’s “control panel”, you see Lekgolo crawling through pipes. If the Harvester were something like the Scarab, and was actually made of Lekgolo, then we wouldn’t see that. Instead we would see a wall of Lekgolo, just like in a Scarab. This isn’t the first time that the Lekgolo have crawled around inside things before, in fact they did the exact same thing to the Forerunner Keyship on High Charity, and could even control it. If the Harvester were made of Lekgolo, then shutting it down like we did in the mission wouldn’t be possible. You can’t shut down a Scarab like that, since it’s technically a life form.
It’s name is also strange. Since when has a Covenant vehicle been named after it’s function? Something definitely doesn’t add up. Even if you think it’s Covenant, you have to admit that there’s definitely more to the story.