Leviathan  

Levia-nee, レヴィアタン

The demon known as Leviathan embodies the sin of envy and represents the second eldest Stake in Purgatory. As the voice for the younger sisters to Lucifer, she possesses a self-centered, envious nature that drives her to always compete and win at any cost. Despite her harsh personality, she excels at identifying others' weaknesses. However, despite her best efforts, Leviathan struggles with clumsiness and often finishes last in activities alongside her sisters. She is depicted as a young woman with wavy, green hair.