Titan Cult

Information
The Titan Cult, though it was never given a name, is a violent group of somewhat suicidal people who worship Titans. It is unknown if they know much about titans or if they see them as some kind of release. They are shown to be quite violent as they killed nearly everyone in the Inocencio household. They also seem to be numerous and somewhat manipulative, as they were able to kill a governor and outmatch the Survey Corps, and the Garrison.

History
The Worshipers and their new leader, Elena Munsell, were able to kill the local governor and open the gates. When they opened the gates it's likely that most of the Worshipers probably died in the initial fight with the survey corps and later when the titan invaded.

When Dario was buying Kuklo from an old man, the man stated that someone else had tried to buy Kuklo before, and he was "a gloomy man in black rags". This is implied to be a member of the Titan Cult.

Then fifteen years later more Worshippers attacked the Inocencio household, and killed many servants as well as Dario Inocencio. Many of their members were killed in the attack, likely by Xavi as he defended he and his sister, Sharle. According to one of the Worshipers, they were after the "Titan's Son".