I think separate if they are unique enough to warrant that.
It there is a theme that connects a few of them, that might make sense too. Especially if their history and motivations overlap. Then it would be natural to lump a few PCs to stage a scene where they can be used together.
If they can be summarized, perhaps just a descriptive list of PCs, maybe you can add some others and make a 30 Guild Game PC's type post?
There is no wrong way. I would step back and see how the Citadel could use them vs. how you use them. If that makes sense.
Again, there is no right or wrong answer to that. Whatever makes the most sense to you will be perfect for us!