My Suit-Wearing, Spikey Haired Time Lord

Charlie or Claudia as she hates to be called. Lives in an orphanage with her brother Milton. Charlie was dumped when she was reaching the age of two. Milton and Charlie couldn't be more different, Milton being the down to Earth smart guy and Charlie being the imaginative, running wild girl. Charlie has always been bullied for this but doesn't know why she is so different to the rest of them and feels that the only one who understands her is her imaginary friend; he does not have a name but has his own personality. Charlie is soon to discover that her imaginary friend is in face modelled upon someone she claims to have never seen before but the stranger seems to know more about her than she does of herself.