Leviathan is known for being very moody and envious, with a very self-deprecating side, often proclaiming himself to be a worthless otaku. He's very nerdy, and considers most people to be normies. Despite coming off as rude, he can be very anxious and shy, and dislikes leaving the house. Despite not thinking highly of himself, he's naturally talented at quite a few things. He's rather tsundere and bad at expressing himself, yet ends up being incredibly clingy and even possessive at times.