It sounds like a teenage girl who didn't realise she was special until the eve of her 16th birthday, and now has to fight the oppressive force that governs her nation because no one before her has been able to do so. Or a tree. It sounds like a tree, too.
Ottilie
http://www.behindthename.com/pnl/116467
http://www.babynames.com/namelist/9808453