Martin Henri is the current leader of the Luddites, but does not appear in the game currently.
Martin Henri used to work for Aeon Corp before he started having dreams about the evils of technology. A familiar old man frequents his dreams who tells him that his destiny is to destroy the Power Transfer System in Cap au Diable. Henri's dreams have both given him superpowers to recruit new followers as well as driven him mad.
Within the Rogue Isle Protector newspaper missions, there is a contact which you must kidnap who is known as Camille Henri, who is apparently the sister of Martin Henri.