Ezekiel is an anthropologist with the Followers of the Apocalypse. He shows great interest in the Great Khans as a tribe. He speaks in-depth about the Khans and their history, feeling sympathy for their tragic past.
He appears at the trading post, even if the Courier has not met the Followers previously.
He has the dialogue of a generic Followers guard before the quest.
If the Courier joins the Followers he will assist him/her in combat instead of fleeing as usual.
He may mention the Vault Dweller destroying the original Khans if the Courier talks to him.
Julie Farkas accepts Jerry into the Followers because Ezekiel has been looking for an assistant. Instead of travelling to the 188 Trading Post where Ezekiel lives, Jerry travels to the Old Mormon Fort instead.