I caught 5 queens walking on the sides of roads trying to invade host Lasius neoniger. I have 4 queens in test tube setups with pupa and a single worker for each. I also have a much larger amount of workers/pupa in a plastic container where I introduced the 5th queen to. So far they are getting along just fine.
With this one there is a dead worker because I was experimenting a little bit. Turns out they don't take interest in killing workers or dead workers.