Could be a bug in coding tbh. Especially since this has happened to apparently a lot of people, after a quick Google search. She isn't bothering anybody being in Main Street and hey, free visitor of sorts lol.
Thank you all for your replies, at first I thought she was taking an actual space in town but as of right now I do have 10. I'm trying to get peck to move out now and probably axle so we shall see if she leaves or stays after. When molly moved in that's when she showed up and has been stuck since and I have no interest in her at all. I actually got Molly from my sister in laws town and she also had dora... Wonder if that has something to do with it.
It bothered me because I wanted the villager there and couldn't get her
So, I do have a chance to test this as I just reset.
In my old town, it took 3 villagers to move out from starting before anyone showed up on my Main Street. Currently, I have only had Gala and Hugh move out, and neither have visited my Main Street. I'm also curious to see how many move-outs it takes before they legitamately don't show up any longer, and if I can get that glitch to happen too, I really want to document that.
It's a really bizarre issue, but it doesn't seem to have any ill effects, right?