Elodie, 15, was last seen at Fareham station at 9.30am on Sunday, July 13.
It is believed that the teenager from Hedge End, who also goes by ‘Wren’, may have travelled to the Plymouth area.
Wren is described as white, about 5ft 7in tall, slim build, dark brown hair with blonde roots in a short bob.
READ MORE: Daily Echo sets up book of condolences after two teens killed in crash
She was last seen wearing a grey vest top, black cycle shorts, black Reebok trainers, and she was carrying a white Hello Kitty bag.
She was wearing two hair black hair clips in her hair.
Anyone with information about Wren’s whereabouts are asked to call 999 immediately, quoting reference number 44250312072.
UPDATE: Her name has been changed to Elodie after incorrect information provided by police was updated.