Aizen laughed to himself. Hearing Grimmjow getting disciplined from Ulquiorra, even after all that was somehow humorous to him. The night had been surprisingly eventful, almost shocking. Ulquiorra had put on a worthy preformance for Aizen, he always did, but that was to be expected. But Yammi had managed to make him break his character and evoked such a look. The game had just gotten much more interesting. How far could he push the smaller espada before he pushed back. How much punishment would he take from Yammi before he fought back, only to find he wasn't so strong as he believed. Grimmjow certainly had a point, the unspoken one of course that he denied constantly, but a point nonetheless. Ulquiorra was a predator, and seeing the way Yammi managed to break that facade and evoke such a leer from Ulquiorra had almost made Aizen need to step in and take him for his own. Something needed to be done. Aizen had beaten him senseless, left him broken and shattered, raped and tortured, but never had Ulquiorra felt as though Aizen deserved any kind of pain for it. It was for that reason that Aizen continued. Ulquiorra knew his part, and how deep his loyalty ran was more attractive even than his ability to take such punishment. But never once had he managed to break that facade, not as thoroughly as Yammi had tonight. Not once had Aizen witnessed such a powerful emotion from the smaller espada. Grimmjow was right, it would be interesting to see one so powerful be brought down to base instinct.
The echo of his feet in the halls of Hueco Mundo were peaceful. There was more plotting to do, advancing his position among the other hollows of Las Noches, and missions for his espada, but this would certainly entertain his otherwise unoccupied thoughts. Gin laughed from Aizen's side, remarking somewhere from his side that Aizen always had a special smile for those thoughts of his. I brought a broader smirk to his face as they walked together, tomorrow was another day for advancement, but no doubt was left in his mind that something had to be done about his emotionless creation. They would settle this later.