Ulquiorra Schiffer is the rather stoic 4th espada from the hit anime "Bleach". If you are interested in cosplaying him, read on.
Wear a black semi-shaggy wig that falls just to the jaw line. Getting the ends razored slightly would be best, since it would make the wig more realistic looking. Also, part the bangs on the right side and left, having a piece of hair in the center of the face. Part of this will later be covered with his "hollow mask". You can also cut your own hair like Ulquiorra's. Try choosing a good quality hair stylist or opt to cut it yourself. Both should follow the description above. Try using photos of him to help give you an idea.
For his attire, it's best to sew this costume. You can however, buy it online though it's strongly recommended you not since it can look cheap and it's very expensive.
Wear white sandals that are black and go up the ankle with black socks.
For his hollow mask, it needs to be almost like a skull-like cap with a ram horn extending out the left. This mask covers half of his left side of the head and doesn't cover the eye. The best way to make it is out of mache.
Paint a black hole in the middle of your chest. This is his "hollow hole".
Carry a sword of his zanpakutō.
Wear bright teal-green contacts since Ulquiorra is known for his bright green eyes.
Your skin and face should be painted pure white. On the face, you should also draw teal-green tear streaks going down the face from the bottom eyelids.
Line your lips
Find a guy to cosplay as Aizen and obey everything he says. Also, take care of an orange haired girl and call her "woman" a lot.
Never smile and always remain stoic and emotionless.
Say that you have a strong belief in materialism.  X Research source , meaning that he only believes something if he sees it with his own eyes. This is different from consumerism and economic materialism.
Call anybody below and inferior to you, "trash".
Speak to people in a monotone voice. Try not to show your feelings.