Enemies as you were, fighting with Aizen is one of the fun things. Sure, he'd taunt you like he'd taunt Grimmjow during their fights, but he said it with more amusement than anything. He tries to hide the true care he had.

"You're weak. It's pathetic. I wish I could spare an ounce of pity for you." Aizen snickers, his blade close to your neck.

His foot pressed onto your chest, feeling every breath. It makes his heart race to feel your chest heave, to see your wide eyes and fearful expression.