Ulquiorra Cifer is an Arrancar that serves as the 4th Espada in Sosuke Aizen's army. Ulquiorra is very unique among the Arrancars in which he displays signs of nihilism and often questions his own existence. As a result, he comes across being emotionless and displays little to no regard for any form of life. His cold demeanor allows him to stay completely calm and in control in most situations, and he is not easily surprised or caught off-guard. He is also shown to have great foresight and patience. He refers to anyone he does not find interesting as "trash," and treats them as expendable. Despite this, like most of the other top Espada, he is not particularly violent, and will only fight when provoked or ordered to by Aizen.