Mundus is the sadistic king of the demon world. Resembling a seraph, he was defeated by Sparda 2,000 years ago. Mundus is dozens of feet tall, with white feathered wings and a third eye on his forehead. He is disloyal, killing one of his generals for failing to defeat Dante. Mundus, the nemesis of Dante and Sparda, is responsible for the death of Dante's mother and the corruption of his brother.
Source: Wikipedia, "[en.wikipedia.org/wiki/Characters_of_Devil_May_Cry%23Mundus Characters of Devil May Cry]", available under the CC-BY-SA License.