Dora is a super-heavy artillery, she is Leviathans wife, and mother of her son. Dora is a 80cm K/E railroad gun used by leviathan, Dora is known as the wife of leviathan and the mother of Sin. She has a hatred for whenever brings a new monster, as she shot and temporarily killed the KV-54, or whenever leviathan refuses to answer anything about their son. (From the fandom, Gerand). She can also create giant gateways used to get to earth/hell the same way as Leviathan.