Alcazar

Alcazar is a green bug like alien who can change shape. He is the only one living on his planet Cyclopia and lives in five castles. After discovering that Leela was the only one of her species, he morphed into a cyclops and told her they were the only ones left. Alcazar treated Leela like his servant and was about to get married to her until Fry revealed he was planning to marry four other women and he showed his true form (a grasshopper-like alien).