Wow, MC was actually a decent person.
Wow, Kohai has a chance!
WOW, this comment section.
At this point, I'm actually against sending her to school. That's opening several legal, social, and emotional cans of worms with a very delayed timeline for returns on education. Teach her how to cook, how to work, how to file for applications without getting screwed, and how to defend herself in the wide open world. That will get her the strength she needs to face her home, if strength was all she needed. If not, being able to work for her own living will give her the self-esteem to consider self-study or community college or something.