Miya was last seen in the Saltash area on Friday 14 June.
She is described as a white female, of slim build and has long pink hair, which is usually tied up. She is 5ft 4in tall.
She often wears pink clothing and white hi-top Nike Jordans.
It is believed she has travelled to the Nottingham area.
If you have seen Miya, or know of his whereabouts, please call the police immediately on 999, quoting log number 50240151506.
