Being stolen away in the midst of the night. Voice breaking, wanting to scream and plead for help. Knowing she was being dragged into darkness, and could do nothing about it. Imprisonment in the land of the damned. The memories have become nightmares.
The nightmares reassert themselves over and over, striking during her most vulnerable nights when she feels like curling under the covers and weeping. It doesn't cause her to wake up screaming anymore, but Aizen usually orders a nighttime guard to watch over her chambers, anyway. Sometimes in the morning, Ichimaru solicitously inquires after her health, his ever-present mocking smile tearing into her.
This, she realizes, must be what Persephone felt like.
I am incredibly fixated on the Persephone myth here...I swear I will find a more original topic for the next drabble.