Harper's imaginary friends

Harper has been making a lot of phone calls lately.  She is always very serious when she is talking, and wanders the house while she is on the phone.  The last couple of weeks, she kept calling a police officer or a "cop", who kept told her that Luke or Lexi's leg was hurt, but they were okay?  Then yesterday, she said she was talking to her friend "Eesa", she even had Alan talk to Eesa, and later Eesa called back and said she had a little boy who was named Alan.  Today Harper called and said she was talking to her friend "Daisy".  I asked her if she had talked to Eesa today and she told me "no, Eesa wears a red shirt, Daisy wears a blue one and I like her better."