The recent episode got me thinking about how fascinating Junko is, not just as a character but her place in the overarching narrative as well.
She dies in the series very first entry while our knowledge of her is still murky, yet we learn just how terrible of a person she is in every subsequent work where each one makes her out to be worse than the last.
In DR, she's clearly an evil malicious sociopath as Monokuma and is allegedly responsible for the end of the world, a revelation that happens while she's being a wacky Joker type character. Then in Zero, we see just how dedicated she is to despair by killing her boyfriend gruesomely, the first direct act of violence from her in the series. Then in 2, we get more information on the tragedy, unambiguously placing her in the "mass murderer" category while also learning of her talent for manipulation and torture. Then in Despair Girls, we learn her plans included the direct merciless slaughter of A LOT of children, even if she wasn't super committed to the plan in the first place. And now in 3, we're actually SEEING her torture methods while giving us the most gruesome segment in the entire franchise with no remorse, almost directly addressing the audience with a "this is fucked up, right?" by making her sister sing to make it extra brutal from soundtrack dissonance.
And the kicker to all this is she's been dead since 2010. That satisfaction you get from seeing an awful villain die horribly? It already happened, and arguably in the least satisfying way possible as there's no way to give Junko a "taste of her own medicine". Inflicting the same degree of despair that she inflicted on all her victims would just make her happy. It's both genius and incredibly frustrating.