Is this bug harmful to my plant?

Check your stems for brown agglomeration of weird looking stuff. The stem would be swollen in that spot. If that is the case, an egg has been inoculated there and soon a larvae will crawl through the inner of the stem to the buds and start eating them from inside out. His poop will make the bud mold.

That bugs are landing on your plant could mean you don't have enough air circulation. Flying bugs hate circulated air because it makes it difficult for them to fly. Try to see if you can blow those suckers out of your grow area. Cuz harmless or not, bugs shouldn't be landing on your plant. Don't let those things waste your time and effort. Good luck, buddy! Hope that helps.

Hey @Papa_T, I believe that it could be a small moth considering it is an indoor grow and it flies towards lights. It seems like there is only one in the garden. I have not seen any others. Thanks for your response.

Hey Glass, its a "metcalfa pruinosa". Jumping bastards. Get rid.

Get rid.

I would definitely remove it from the garden. How many more are there? It looks like a random small moth. It’s probably looking for some leaves to munch on. One isn’t really a cause for major concern. Now if you have a few I’d be starting to get my guard up. Hope that helps friend.