^ Not necessarily. She could also be on a visa, e.g. as an H-1B dependent.
Will colleges look at her as an international student or as a normal applicant?
Academically, her application would be read side-by-side with her American classmates. However, she may not qualify for in-state tuition or in-state scholarships in her state, depending on her actual immigration status and the rules of the state. She would not qualify for federal financial aid until she's a permanent resident.