Ulquiorra found himself in a relentless battle with his own emotions.
It was a feeling foreign to the Espada, and he was unable to grasp ahold of this queer sentiment in his heart.
What he didn't know is that, there is no explanation for Love.
0: Revelation
"…Do you know anything about this?" Ulquiorra was asking Syazelapporo, the mad scientist of their Espada Army.
This feeling was too pressing, and a little suffocating. The Cuarto needed answer, he had been avoiding Orihime for a while and it was irresponsible for him to do that. He was her warden, he was supposed to watch over her.
But Ulquiorra was a man above all.
Ulquiorra figured that if he wanted to get a straightforward and honest explanation, the Octava would be the one to go to. The Cuarto knew that Syazelapporo possessed intellect regarding all scientific matters, and he would be able to resolve this strange sensation that he had been having.
"So you are saying that every time you look at that woman," Syazelapporo coughed as he corrected himself upon Ulquiorra's glare, apparently only he had the rights to address Orihime as 'woman', "I mean, Inoue Orihime, your heart would start to beat faster?"
Ulquiorra then began his lengthy clarification about how he would feel extremely self-conscious around the woman, and how contented he would feel when the woman smiled at him. Syazelapporo could only raise his eyebrows in skepticism.
"Well, it's impossible or so I thought, for a hollow, for us, to feel this way but…" The scientist placed a finger against his lips as he contemplated on Ulquiorra's diagnosis.
"I believe you are in love with Inoue Orihime."