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you would want to have her evaluated by a psychiatrist. Individuals who are severely depressed may report similar scenarios especially about seeing shadows at the corner of their eyes.
She is also reporting auditory hallucinations which, too can take place during a psychotic episode during depression.
Have her be evaluated by a child/adolescent psychiatrist who can also prescribe medication to treat the depression as well as the hallucinations. The person can also rule out other possible reasons such as schizophrenia.