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.
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.
Amy- Amelia Hope Cahill
Dan- Daniel Arthur Cahill
Their parents are in madrigal branch and it said it in the last of book 6 in too deep and also one more thing. ( They are good. )
Amy and Dan Cahill are Madrigals
They are M
Madrigals
yes because we (the people typing here) are cahills. we are amy, heavely and dan.
In Book Seven: The Viper's Nest: Amy and Dan Cahill figure out they are Madrigals
i believe Amy and Dan are Madrigals.
In the book THE VIPER'S NEST it reveals the Dan and Amy are Madrigals.
Madrigals
madrigal
Dan Cahill that is his real name.
They are Madrigals. So are Grace and Hope Cahill.
Amy and dan are madrigals, the man in black is their great-uncle, fiske cahill, Nallie is a madrigal too, and Fiske and nellie are the new legal guardians of Amy and dan.
Amy and Dan are siblings. Amy loves Dan as a sibling and a brother.
Lucian, well that is Madrigal, a type of Lucian.
They are Madrigals descended from Madeline Cahill through Grace and Hope Cahill.