Hairy Henry is a member of the Followers of the Absolute that may be found in the sanctum north of the Barracks in the Mind Flayer Colony, being rallied by Kressa Bonedaughter along with his fellow cultists Ironfinger and Maghtew Budj. If the party waits too long before approaching, Kressa's speech will give him and the cultists 10 temporary hitpoints through a buff called Myrkul's Gift.
Act Two
Henry will attack along with the other followers in the Barracks if the party initiates combat through dialogue with Kressa or if attacked. If left alone, he will move to his room in the south-west part of the Barracks, greeting the party with "Heed the Mistress. She is blessed" and "Walk in shadow" if spoken to.