Mard Geer is a character from the anime series "Fairy Tail." It is a unique name, and therefore, synonyms for this may not exist. However, we can use words that describe his character or appearance. Some adjectives that can be used for this are creepy, evil, cunning, and powerful. In terms of his appearance, we could use the words demonic, monstrous, and intimidating. These words capture the essence of Mard Geer, a villain who is feared and respected by many. He is one of the most memorable characters in "Fairy Tail," known for his unique personality traits and powerful abilities.