Age: 19
Height: 180 cm
Weight: 65 kg
Nationality: European
Home: Earth
Family: older brother of Relena
Occupation: OZ Ace Pilot/WhiteFang Leader
Mobile suit: Tallgeese; Epyon; Tallgeese III

Zechs Marquise is OZ's most elite soldier in Gundam Wing and one of Treize's two closest companions. While with OZ, he wears a silver mask to hide his true identity - that of Milliardo Peacecraft, one of the two surviving heirs to the destroyed Sanc Kingdom's throne. When his mask shatters in battle, Zechs leaves OZ and becomes a peace ambassador for the Sanc Kingdom. After Sanc is destroyed a second time, he becomes the leader for a rebel organization called White Fang and tries to achieve a total peace through war. An excellent pilot, Zechs uses the mobile suit Tallgeese and the Gundam Epyon.

In Frozen Teardrop