We know nothing of Seiko's family, to claim she "inherited" her madness from someone is a bit bold.
Also, as someone who has to deal with mental disorders, I find it odd that mental illness can be inherited. I know genetic disposition plays a part, but that's it.
Seiko: A child of fault?? Seiichi: One fault?? Maybe I have too much thinking about the name but it still bothers me. I don't know much about Japanese too.
oh so that thing where it was implied she pushed shigeru off because he was bullying seichi is not true
its like shigeru was seichis stand in , she wanted to push seichi off the cliff
those were the kind of vibes i got from her idk i could be wrong