Ryoko Otonashi

Ryoko Otonashi, the Ultimate Analyst and alternate personality of Junko Enoshima. She was created when Junko had select memories removed from her to create a version of herself that could experience the despair she created for the first time. Ryoko is "killed" when she snaps and reverts back into being Junko.

Despite being a version of Junko, Ryoko is very much a nice person who wants to get to know people as best as she can. She has a neurological disease that erases her memories which is why she carries around a notebook of her memories and causes her to focus on trivial things which causes her to be seen as weird by others.

What could possibly happen to such a nice and eccentric girl that would leave her exposed?

Does her other self set her up? Does her Junko side try and make her have some fun? Or does her lack of memories come back to haunt her?