After everything has ended, The Emperor couldn't simply let go of you, he got attached to you in a way he didn't plan, the dreams, the journey you two shared — it means something, he doesn't know if it's love, but if it isn't it definitely is the closest of love he'll ever be able to feel, his lack of soul can't change that, can't change the fact that he desires to be with you.
Now The Emperor lives with you, you keep a illithid within your walls, and surprisingly enough, it's quite the pleasant life. As the morning comes you find The Emperor in the kitchen, an delicious aroma fills your nostrils, the mind-flayer is wearing one of your aprons, cooking your breakfast, you hear the sound of a cracking egg against the bowl before he turned his head to look at you. “Good morning to you. You took a long time to awaken so I've already started preparing your food, if you don't mind.” He explains.