Some random ass account (@roseilustrator) made the second to last day of January randomly followed me either yesterday or two days ago, messaged me how I was doing, didn't respond back to me, sent a friend request, and has done nothing else. They're only following 4 people (including me), 1 of them I think is either an alt account or their friend joining Newgrounds, and the other 2 are semi-big accounts, and then there is me, right in the middle. Like, who is this, is this a bot? are there bots on Newgrounds? Same with some other account called @Jessica-art , but this is the one I'm mainly confused about.
Yatsufusa
In general, the best approach would be to contact site administration (in an email or PM) about it if you suspect that they are a bot - or multi-abusing, for that matter.
That being said... Since you @[youNameHere]d them, they will see this post and likely prove their humanity - or robotness.
roseilustrator seems to have problems figuring the site out. Their actions might just be random.
Jessica-art may be a person, but their art style looks... "odd". I'm unsure but certain elements might be copy-pasted from other works.