I found a couple of these guys sitting on my tomatoes. They tend to stay right on the fruit. Are they good guys or bad guys?

If they are bad, are there good guys I can release to fight them?

Looks like a stink bug. Some will harm your plants like the Nezara viridula (southern green stink bug) or Halyomorpha halys, etc.
I would not want stink bugs on plants, maybe someone can identify the exact stink bug species that one is.

Looks like a shield bug, maybe a bordered plant bug of some sort (Largus sp.). It might help to know where in the world that bug lives to get a better ID.


Virginia