Leviathan is the Avatar of Envy and is the 3rd oldest among the seven demon brothers. He is one of the main characters in Obey Me! One Master to Rule Them All. Leviathan is a tsundere and an otaku. He spends almost all of his free time watching anime, reading manga, or in some way consuming media. Leviathan is a hikikomori and rarely leaves his room, choosing to take online classes instead of having to go to school and often has high anxiety when he's forced to attend social gatherings.