Leviathan is a character from the anime series 'Nanatsu no Taizai', also known as 'The Seven Deadly Sins'. As the embodiment of the sin of Envy, Leviathan is depicted as a formidable and intimidating presence in the storyline. Known for their immense power and cunning nature, Leviathan plays a crucial role in the series, often challenging the protagonists with their strategic maneuvers and dark abilities. Despite their antagonistic role, Leviathan's complex personality and backstory add depth to the character, making them a memorable figure in the series.