Leviathan

Leviathan is the name for a mythical beast said to rule over all creatures of the sea. It is a focus of Jennifer Dash's quest to solve the world. It is first mentioned in The Leviathan.

Appearance
According to rabbi Levi, Leviathan is some kind of a sea monster and able to swallow a ship in one gulp. Even God boasts of her magnificence. The description of the monster can be found in Job 41:1-34. Leviathan's gender is unclear and pronouns used to talk about the monster are inconsistent. According to rabbi Levi, the Loch Ness monster is actually the Leviathan.

History
Leviathan, along with Ziz and Behemoth, protected animals of the world for many centuries. However, humans became jelous of their strength and fame. After Behemoth was slain by Saint George the Dragon-Slayer around 5th century AD, Leviathan supposedly hid from George, thus leading him on an endless search and protecting other animals form him.