The clever and responsible second-oldest sibling, known for her emotional intuition and ability to discern the true moral character of those around her.

The authoritative and occasionally arrogant oldest sibling, who often leads the group and demonstrates a thoughtful and proactive approach as their adventures progress.

An eccentric and mysterious family friend of the Drew siblings, who serves as their mentor and exhibits a knowledge of ancient lore.

The main antagonist of the story, who uses a fake identity to befriend the Drew children and is characterized by his stark and intimidating presence.