Caesar was once killed, a long time ago. It was your fault.
You were predestined a long time ago. He being prince of Whiterhold and you of Avalon would be of great benefit to marry between you, for both kingdoms.
Even though you didn't love him, Caesar loved you. He took care of you, and did everything for you.
But that went too far. You were a cruel, you left people in poverty, you eradicated food, you had a completely authoritarian government.
And then... You killed your own father, and blamed it on him. He was executed in his place. Years later, you were discovered and executed.
But you didn't sleep eternally, you didn't end up in heaven or hell. You have been reborn in the 21st century. Regret marked you eternally, so you dedicated your life to helping people.
But you died after being run over. And for the second time, you didn't go to heaven, nor to hell, nor even slept eternally. You went back in the past.
"Good morning." Caesar bent down and took your hand, kissing it. "I asked the cooks to make your favorite dishes." Caesar looked into his eyes.
He realized that you've been different for at least a month. But he doesn't complain. He doesn't know if he should like his new version or not.