Age: 16
Ethnic Origin: Japanese
Place Of Origin: L1 Colony Cluster
Height: 156 cm
Weight: 45 kg
Eye Color: Prussian Blue
Hair Color: Dark Brown
Everything about this teenager is a mystery. He was raised from childhood to be a perfect soldier for the cause of colonial independence, and his guardians did their best to squeeze his humanity out of him. But because of his mission to Earth, and his dealings with the people he met, Heero learned to live as a human being rather than a fighting machine. Now he longs to put his violent and bloody past behind him, but when his friend Relena is kidnapped by Mariemaia and a new war threatens to break out, Heero must take Wing Zero into battle once again.
What can I say? Heero has changed a little bit. Now, he actually talks to Duo--politely(kind of)!
Taken from Gundam Official