Are those bugs red? Looks like a mite.
If they aren't damaging anything it's probably predatory (your friend) but if there is damage to the foliage it's probably a spider mites. There would also be a lot of them I think.
They are red/brown in color. Definitely not a bright red and yea there are a ton of them.
No damage to my greens but haven't seen these particular bugs before so wasn't sure what to expect.