What is that green guys name in bleach?

"If you are talking about the guy with the half skull thing on his head, the tear-like scars, and the green eyes, that person's name is Arrancar"

The guy with the "half skull thing on his head, the tear-like scars, and the green eyes" his name is Ulquiorra Cifer and he is Espada #4 in King Aizens Army...wow you dont know crap bout Bleach do you?