Ulquiorra Cifer

Ulquiorra is a very cold, callous, and dispassionate figure, and is rather aloof, brooding, and indifferent, willing to harm his comrades in addition to his enemies should they get in his way. 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.

As stated by Grimmjow, Ulquiorra demonstrates a strange habit when killing victims he is particularly interested in; he stabs them with his bare hand in the same location as his Hollow hole. Whether he is consciously aware of this habit or not is unknown. During a speech to Orihime, he claims he does not believe in Human emotions, which he refers to as the "heart," reasoning that if his eye cannot see them, they do not exist. These words, and much of Ulquiorra's overall behavior, reflect the concepts of materialism, which connects to his aspect of death as an Espada, Emptiness.

Ulquiorra also acts ruthless and intolerant of those he placed beneath him, as he hits Yammy for his recklessness, insults the actions of Orihime's friends to which she slapped him, or when Ichigo considered that he had "become more human" he hit the ground with great anger, visibly insulted.

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. Whereas most Arrancar give their regeneration power upon become such in return for greater strength, Ulquiorra chose to keep his regeneration powers and instead train to make up for the extra power he would have otherwise received. However, he does not seem to comprehend the trait of fighting against all odds; during his final battle with Ichigo, he completely overwhelms the Substitute Shinigami after entering his Resurrección, yet Ichigo continues to fight on regardless of this, prompting a visibly frustrated Ulquiorra to yell about how pointless Ichigo continuing to fight is before entering his Segunda Etapa form in an attempt to show Ichigo "true despair".

Ulquiorra can be intimidating, controlling and abusive, coming to Orihime's chamber and ordering her to eat a meal an Arrancar servant brought in, claiming that, for Aizen's benefit, it was her "duty" to stay alive. When Orihime hesitates, he threatens to force the food down her throat or strap her to a table and feed her via an IV. This implies that, while he prefers not to dirty his hands, Ulquiorra is fully capable of committing truly abhorrent and inhumane actions without feeling any shred of remorse or hesitation. Despite his demanding nature, Ulquiorra is not vain like most of his fellow Espada. He maintains a cautious and cool demeanor, being always in control of his actions. He holds himself with decent dignity and finds Nnoitra's taunts about "punishing" Orihime repulsive and vulgar.

After Ichigo's Hollow form overwhelms and strikes him down during his last battle, Ulquiorra maintains his composure and calmly berates himself for being defeated by a "Human-turned-Hollow." Believing he no longer has a purpose in life since he was so utterly defeated by his opponent, he demands that Ichigo kill him and compliments Ichigo when he decides to use a point-blank Cero to kill him, claiming the lack of mercy is "rather Hollow-like."