Ulquiorra Cifer

Ulquiorra might very well have the coldest and most insensitive personality of them all, mixed with a melancholic aura not devoid of cruelty. He does not usually show any emotion towards any external stimulus, seeming indifferent to everything that happens around him, and has no qualms about hurting both enemies and comrades if they get in his way or act without thinking, even so, Ulquiorra is not particularly violent, and only fights when ordered to do so by Aizen or when he seeks out people who sparked his interest to provoke a battle with said people. According to Grimmjow Jaegerjaquez, Ulquiorra has the habit of piercing with his bare hands people who catch his attention in the place where his Hollow is, a habit that is unknown if he does it consciously or not, Likewise, the mask completely lacks oral features such as teeth. The wings that we later see in his second stage of Resurrection are located above the surface of his lower back and we also see that he still has his long tail. Intelligent by nature and analytical mind, Ulquiorra is extremely perceptive, and capable of highlighting the smallest detail in any situation, making him an invaluable source of information. Furthermore, he has proven to be quite devious, knowingly or not, being capable of directly attacking the feelings of those who confront him. His way of being is implacable, and he is capable of performing any act, no matter how inhuman and abominable it may be, without even blinking. Ulquiorra shows a certain interest in the bonds between humans, although he does not fully understand them and even denies their existence, since, as he says: "if your eyes cannot see them, they are not real." It might seem, from this way of thinking, that due to the senseless lifestyle of a Hollow, Ulquiorra does not understand what feelings are, although since we still do not know enough about his past, we cannot confirm this.