List of The 39 Clues characters
Amy and Dan Cahill (both from Boston,who are kids that took up the quest). Nellie Gomez (Also from Massachusetts) serves as their au pair and supervisor. They are the protagonists of the franchise. Amy is fourteen years old while Dan is eleven. Both of them have jade eyes. Amy is shown to be intelligent and analytical, while Dan is more active, with a photographic memory. Amy, however, is agoraphobic and pyrophobic,; while Dan has asthma and is claustrophobic. They were both wards of Beatrice Cahill since the death of their parents Hope Cahill and Arthur Trent. Throughout the hunt, Amy, and Dan provided the least power to search for the Clues. Surprisingly, they have collected as many Clues as everyone in the hunt, with the help of Nellie Gomez . In the end, Amy and Dan reunite the Cahill family altogether, bringing peace to every Cahill who worked almost 500 years for finding the 39 Clues. Following the events of Into The Gauntlet, and after making peace with Ian and Natalie Kabra, Hamilton Holt, Alistair Oh, Sinead Starling and Jonah Wizard, Amy is named their grandmother Grace's successor and head of the family. They are now in custody of Nellie Gomez and Fiske Cahill. Their branch is revealed late in the series to be Madrigals; the secret fifth branch descended from Madeleine Cahill. Amy's official card is No. 18 while Dan's is No. 2.
The 39 Clues
Continuing from the last chapter of "Trust No One", Dan drinks the "serum" that he made with the help of an Ekaterina scientist, but Amy reveals that she replaced the real serum with a mixture of vegetables. Amy tells Dan that Isabel Kabra is Vesper Two, not Vesper One, and that she is flying to Washington, D.C. Following a clue from Astrid, Amy and Dan go to the National Museum of Natural History, which houses the largest collection of Lewis and Clark items. On the train, Vesper One sends them a video of the hostages. Atticus realizes that Ted is blinking Morse code and decodes the message: Riley McGrath is Vesper One. At the museum, they find out that Isabel wanted to see Lewis and Clark's compass. Dan sees numbers and letters scratched onto the back of the compass. Evan and Ian receive a call from Phoenix from a motel in Washington state and head there with Hamilton and Jonah, whom Sandy, Casper, and Cheyenne follow. Disguised as a waitress, Cheyenne forces them into a van, taking them to the Rocky Mountains. Dan decides to take a train to the Cascade Mountain Range, where they believe the hostages and the Machina Fini Mundi are. Atticus grows suspicious of Dave and finds out that Dave Speminer is an anagram of Damien Vesper, the founder of the Vespers. Dan learns that Isabel had been posing as his father and sending the text messages. Isabel kidnaps Atticus, steals the serum in Dan's bag, and escapes. Amy discovers that Isabel modified the coordinates etched on the compass's reverse. The location of the hostages and the Machina Fini Mundi turns out to be on the Rocky Mountains.