Okay, here's the truth by studying the Cahill family tree of the Oh family and Grace's family. Grace's grandfather Henry was a Madrigal and married another Madrigal: Flora, who had James Cahill, Grace's father. But Flora died and Henry married an Ekat; Hae Oh. They kept the name Oh and had their offspring, Gordan and Bae. Then Gordan had Alistar.
So Grace is a Madrigal and not an Ekat, it's just that James and the Oh twins are half brothers.
They are Madrigals. So are Grace and Hope Cahill.
They are Madrigals descended from Madeline Cahill through Grace and Hope Cahill.
Okay, here's the truth by studying the Cahill family tree of the Oh family and Grace's family. Grace's grandfather Henry was a Madrigal and married another Madrigal: Flora, who had James Cahill, Grace's father. But Flora died and Henry married an Ekat; Hae Oh. They kept the name Oh and had their offspring, Gordan and Bae. Then Gordan had Alistar. So Grace is a Madrigal and not an Ekat, it's just that James and the Oh twins are half brothers.
Grace and Fiske Cahill's car crash was orchestrated by Isabel Kabra, a member of the Lucian branch of the Cahill family. She was under orders from her mother, Cora Wizard, who is a part of the Ekaterina branch.
Okay, here's the truth by studying the Cahill family tree of the Oh family and Grace's family. Grace's grandfather Henry was a Madrigal and married another Madrigal: Flora, who had James Cahill, Grace's father. But Flora died and Henry married an Ekat; Hae Oh. They kept the name Oh and had their offspring, Gordan and Bae. Then Gordan had Alistar. So Grace is a Madrigal and not an Ekat, it's just that James and the Oh twins are half brothers. That's why Grace and Alistar have a close connection.
Dan and Amy Cahill are a part of the Madrigal branch of the Cahill family. The Madrigals are known for their artistic and creative abilities, as well as their dedication to protecting the Cahill legacy.
Fiske Cahill is the Man In Black, and Grace and Beatrice Cahill's brother.
They are Madrigals and so are Grace and Hope Cahill. You find out in Book 7: The Viper's Nest.
They are Madrigals. It comes from Grace and Hope's side of the family. Amy and Dan learn this in Viper's Nest, Book7.
Grace Cahill is a fictional character from "The 39 Clues" book series. She is not a real person in history or in the present day.
The Madrigal leader was formerly Grace Cahill, but since shes has past, Amy and Dan are actually the branch leaders. I wonder if Amy and Dan know this.
It is William McIntyre.