Satsuki, worst psychologist ever.
She should have raised an alert the day she met "Kaori" for one. And then, not involve a random schoolboy she doesn't know much about, consulted with colleagues, Maho and the mother.
And anyway, Maho should have had therapy from at least age 8, after her murder. And not stay with her mother (and father?) who beat her.
This manga is full of holes (and I say this, even though I'm the one translating it).