The portrait is blank. More specifically her portrait is just a black square. Everyone else is normal from what I'm seeing. Not sure I talked to everyone sense noticing this but who I have talked to is normal.
UPDATE: Gonna say a few things but let's start with what anyone reading this likely is most curious about. Penny's portrait is fixed. How'd I do it? I don't know for sure but I believe the game/switch was over heating or something along those lines, so I suspect when I closed the game and put my switch to sleep for a while the problem sorted itself out. A few minutes ago I booted the game up just to see if Penny's portrait was back and it was.
So, something I want to explain, when this first happened, I thought it was actually a scripted in game event, but then I slowly realized that Stardew Valley isn't the kind of game to go meta like that. I think I know where the confusion came from though. Not too long ago, I played another life sim sort of game that had a similar art style to Stardew Valley. This other game did in fact have fourth wall breaking events, some of which did mess with the dialogue box. Basically, I think I incorrectly remembered events from the other game as though they happened in Stardew Valley. Anyways, thank you to FilthyGorilla for trying to help and I'm sure others tried to look into things for me so thank you to you too.