Musca Dio

Musca Dio (銀蝿座のディオ, Musuka no Dio) (or Dios in the anime adaption) is one of Athena's 24 Silver Saints that fights for peace and justice on Earth.

Chronology (86)
After the two groups of Silver Saints had failed to kill the Bronze Saints, take back the Gold Cloth and kidnap Saori Kido. The Grand Pope felt he had to send a Gold Saint to Japan to finish it all. The one he sent was Leo Aiolia, the brother of the traitor Sagittarius Aiolos. The Grand Pope didn't trust him completely so he sent three Silver Saints to keep tabs on him. It turned out they were true about their suspicions, since Aiolia saw no honor in figthing an injured foe. So as the Gold Saint didn't finish of neither Pegasus Seiya or Ophiuchus Shaina, the three Silver Saints made their entrance. Canis Major Sirius was the first one to reveal himself with Hercules Algethi and Dio behind him. Sirius immediately accused Aiolia of being soft, and seeing as he was the brother of a traitor, the Grand Pope had told them to keep an eye on Aiolia. The Gold Saint responded that he would finish his mission, and said that they should return to Sanctuary. Yet they did not trust him and Algethi took Seiya by surprise and attacked the Bronze Saint. But the attack was interrupted in mid-air by Dio who wanted a piece of Seiya and thus used his attack "Dead End Fly" on him. But his attack was also interrupted, this time by Sirius who said they should compete for the final blow. Thus Algethi threw him up in the air once more and the three Silver Saints prepared to finish him of the fastest they could. But suddenly Seiya disappeared, he was taken in by the Sagittarius Gold Cloth and defeated the Silver Saints in an instant

Chronology (OAVs Hades)
In the Hades arc adaptation in the anime, Dio was resurrected by Hades. With both Heracles Algethi and Canis Major Sirius he set out to Japan for Andromeda Shun. There they fought until Shun equipped his Cloth and easily defeated them, in their dying words they commented how powerful the Bronze Saints had become.

Although Dio's resurrection was clearly depicted in the anime adaptation as a minor addition to the manga plot, Kurumada only hinted it in his manga, with the opened tombs of deceased Silver Saints.

Cloth & Name

 * Dio's Silver Cloth represents the constellation Musca (The Fly), and is depicted as a normal house fly. The anime version differs slightly from the manga original to small details and the addition of foot armor.
 * As with some Cloths, the Musca Cloth represents a constellation that wasn't used by ancient Greeks. The Musca constellation was added by modern astronomers in the 17th century. Masami Kurumada took some creative liberty when using the Musca Cloth, which in his manga plotline, was created in the times of Ancient Greece.
 * Musca is the Latin word for "fly". Also, it's the root of the word "mosca", Spanish for "fly".
 * Oddly enough, Masami Kurumada named him Dio in his manga. In the anime, his name is spelled Dios (Spanish for "god").

Previous Incarnations
Dio's previous incarnation in the 18th century appeared in the still non-canon sidestory Saint Seiya Lost Canvas. His name was not revealed, but he was physically identical to his 20th century incarnation, and was addressed to by the name of his constellation, Musca.

Since this 18th century incarnation appears only in the sidestory Saint Seiya Lost Canvas not authored by Masami Kurumada, he still holds a status as a non-canonical character.