Leviathan

Leviathan (レヴィアタン) is advanced-level furniture created by Beatrice. Leviathan often speaks to Lucifer on behalf of the youngest sisters. At her best, she has a brutal, deeply envious nature and is adept at spotting people's weaknesses. However, she is usually nothing more than a selfish crybaby. For some reason, she's not a very quick thinker, and she often comes in last among the sisters, ends up with the short end of the stick, and cries.