1. Miranda Bloom: The main character, a wildlife photographer who returns to her hometown, Echo Falls, to investigate a series of strange occurrences.
2. Daniel Collins: A firefighter and Miranda's childhood friend.
3. Ava Thornton: A high school student who becomes involved in the mystery and is revealed to have a connection to the past.
4. Elijah "Eli" Thornton: Ava's brother, a young boy with a love for fossils and uncovering secrets.
5. Dr. Sarah Morgan: A scientist and Miranda's former mentor, who is conducting research in Echo Falls.
6. Sheriff Jack Turner: The town's sheriff, who is investigating the strange occurrences alongside Miranda.
7. Mayor Henry Jacobs: The town's mayor, who seems to be involved in some shady dealings.
8. Grace Jacobs: The mayor's wife, a kind-hearted woman who becomes an ally to Miranda.
9. Rachel Brooks: A journalist who is also investigating the mysterious events in Echo Falls.