Annabelle Reyes is a survivor of the bombs and radiation. No she did not come from the Ark but she's an out cast. The grounders banished her to her own death for her mutation. No you can't tell that she's mutated but it's in her DNA. She's not like anyone. She will never be. When the dropship from the Ark arrives Annabelle finds interest in one guy and one guy only. Bellamy Blake.