Guardian Leviathan is based on the Leviathan, shown by its name. The Leviathan is a sea monster described and appearing in the Bible. However, as time passed, the term "Leviathan" became a synonym for 'sea monster'; one example would be the Loch Ness Monster. In Modern Hebrew, however, Leviathan simply means "whale". The Leviathan also appears later in that Bible as one of the Seven Princes of Hell, representing envy. It is also Hell's gatekeeper Hellmouth.