I think it unfair to jump into the yandere trope which is already a negative stereotype of mental illness. Not so much that the characters exist mind you, I too like such characters, but often times it is not too different from belittling the causes for it and the experiences along with stigma that those with psychological challenges face. Rarely do you see discussions in regards to Yuno Gasai's past and why she is the way she is, only that she's cute and "crazy" and that some make her their waifu, even though if they ever met her they'd run for their lives. Yandere in a way is similar to how people use the term "broken" as if people who have had difficult lives or psychological challenges are somehow damaged or incomplete as a person. "These things have happened to you obviously because you're different and something is wrong with you so people can't help it" sort of a thing.
I do not believe Ogata is mentally ill per se. Speculating, she could potentially be diagnosed with depression and possibly PTSD, but just looking at her situation where she has been bullied and arguably sexually abused, it is of no wonder, even without a psychological clinical analysis, as to why she would not value her life much and consider suicide as a way out of what she is put through on a daily basis.
Aside from that, many of the issues seem to be resolved for the most part with the bullying settling down and for wanting to die, I think that part was covered and came to a positive conclusion with Ogata no longer wanting to die, but wanting to do so many wonderful things with Saki.
http://dynasty-scans.com/chapters/futari_nara#22
last edited at Mar 14, 2017 6:57PM