The most commonly grown beans are the green, or snap, bean and the yellow, or wax, bean, which is a variety of the green bean.
Zero (real name David Oh, and formerly known as O, Major Tom, Major Zero and Cipher) was the original commander of CIA Special Forces Unit FOX (Force Operation X). After Zero became a founding member of the Patriots along with Big Boss, the two friends would later develop a bitter enmity.
His body material is comprised of a Titanium Z alloy, and is equipped with peculiar mechanisms called the Z-Brain (the head lens) and the Z-Heart (the chest lens), which conceal an unknown power. Due to the artist character designer change in the Mega Man Zero series, Zero is given a design overhaul. His armor is lighter and more humanoid, and he's given a more streamlined helmet to present a much sleeker look.