<human>: Our daughter's friend is 14 yrs old, not a U.S. citizen (born in Germany), and she comes from a poor family (2 parent home with 6 kids) with a mother who abuses prescription medication and alcohol. She has lived in the U.S. for 9 years but the mother has not followed through with the steps to get her (or her 15 yr old sister) U.S. citizenship. She has been living with us (95% of the time) since last June and has no desire to go back home. Tonight her older sister was physically assaulted by the mother and taken out of the home by a step-grandparent. 
We have questions: 
1) For the near-term, how do we go about getting guardianship so we can do things like take her to the doctor, dentist, sign permission slips at school, etc.? 
2) For the long term, who can help us get her on the path to citizenship? The mother will not allow us (or the kids) to see or have access to the records (passport, birth certificate, temporary green card, etc.) needed to pursue citizenship. Is there anything we can do on her behalf? 
3) Is there anything more formal (other than getting guardianship) that is recommended to make this seem less like a really long sleepover?

Can you condense the text into a few key points?
<bot>: Daughter's illegal German schoolmate has been living with us for a long time and needs citizenship and a responsible legal guardian.