Character from Gundam Wing. Zechs is a pilot for OZ, and is renowned for his great skills, earning him the moniker of "Lightning Baron". He is mostly associated with the Tallgeese, a suit he chose to unearth and pilot despite knowing its performance could kill him.
His usual attire is pretty much almost identical to Mobile Suit Gundam's Char Aznable, with minor changes such as his longer hair, different mask design and lack of Zeon elements in his outfit. Nevertheless, he is almost universally regarded as the one that most resembles Char out of all the "Char Clones" - sometimes above Full Frontal, who is an actual clone of Char.
His birth name is actually Milliardo Peacecraft - meaning he is indeed the older brother of Relena Peacecraft.