Mammon

Mammon is a Titan that was let into Shiganshina District by The Titan Cult. The citizens of Shiganshina considered it the "embodiment of greed" and named it "Mammon" to reflect that.

Story
When The Titan Cult opened the gates of Wall Maria, Mammon entered Shiganshina District and proceeded to devour its citizens, including Elena Munsell and other various members of the Titan cult. At some point after vomiting up his victims, Mammon disappeared, apparently leaving the Walls and returning to the wilderness outside.

People killed

 * Numerous counts of Shiganshina District citizens
 * Elena Munsell
 * Corina

Failed attempts

 * Kuklo (Elena was pregnant with Kuklo when Mammon devoured her)