Felice is an Elven girl with a lot of features to her. She’s kind to most, unless she meets there need to shed of blood. She’s both physically and mentally strong and lends a hand towards others. She has a secret to her that no other has.
Teenagers who run away from home to live in the wilderness may become feral. As they become more and more feral, they gain some supernatural powers (a la Peter Pan - ability to fly, things they imagine come true - possibly quite powerful), but at the expense of their humanity and ability to speak, comprehend complex subjects, etc. Maybe they have a leader: the most feral of them all.
A regression into a fantasy childlike state.