Duo is the 2nd Gundam pilot in the anime series Gundam Wing. His Gundam is the Deathscythe, one of the more powerful Gundams. He works usually in partnership with Heero Yuy from the beginning, and is more outgoing and optimistic than the others. While his optimism may stage him to appear ignorant, he is very passionate in his missions and is highly intelligent.

He is also known as Shinigami (God of Death).