Brady Cahill is an Ekaterina/Madrigal agent.
|Relationships:||Robert Cahill, Karen Cahill|
|First Appears In:||The Maze of Bones|
|Last Appears In:||The Vesper Infiltration Team Book 4: The Dead of Night|
He was present at Grace Cahill's funeral and was present at her will reading. He accepted the challenge and followed Amy Cahill and Dan Cahill on their search for the first clue. He found the first clue but did not inform Bae Oh of this. He then left for Attleboro.
He made it through the gauntlet and found the Serum Formula clue and wrote it down.
He completed all the challenges and became a Madrigal ( he had Madrigal blood in him anyway).
He was sprayed with knockout gas by Vesper Agent Z.
He sent a text message to Margaret Peterson Haddix with some info about the Vespers.