Heero Yuy is the main protagonist of Mobile Suit Gundam Wing. He is the pilot of the XXXG-01W Wing Gundam and its ancestor, the XXXG-00W0 Wing Gundam Zero.

The boy who is given the codename Heero Yuy is of Japanese descent, a complicated character. His cold, stoic demeanor seems more fitting for a battle hardened veteran than a fifteen-year-old boy. When Relena Peacecraft meets Doctor J, the engineer comments that Heero is actually a very kind-hearted young man who keeps his emotions reined in while fighting. On many occasions, Heero espouses the philosophy that being emotional on the battlefield will only result in heartbreak, so soldiers need to be able to fight without caring about their opponents. However, he believes that there's nothing wrong with showing emotion in normal situations. The most important philosophy to Heero's life, however, is the one his father Odin Lowe espouses: That the best way to live life is by one's emotions. Heero is the most skilled and focused in combat out of the five pilots, both in mobile suits and out, which makes him a great asset and a deadly force to be reckoned with.