Her family fled a chemical attack near their home town and for the past few years BBC World Affairs Correspondent Caroline Hawley has been visiting her in a Lebanese refugee camp.
More than 13 million Syrians have had to flee their homes, with more than five million of them now living in neighbouring countries.
The UN says only a tiny fraction of those who need new homes will ever get the chance to be resettled. But Rouaa and her family have defied the odds and are coming to make a new life in the United Kingdom.
Caroline accompanied her on the journey to the UK.
Filmed and edited by David McIlveen
Produced by Greg Brosnan, David McIlveen and Cara Swift
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