She escaped. Somehow, someway, she escaped. When did she escape? She couldn't have come out by herself. And seeing that the body was replaced with another body, it means that someone definitely helped her. Someone plotted and planned to help her.
And now that I'm certain she's out of the tomb, I don't need to think too far to know who could have helped her. Jonah Reinhart.
It's all coming together. Quickly.
"Brother, now that we know for certain that Mila survived, we can easily deduce that Jonah Reinhart helped her. But the question is, why are they acting up now? If she's been free for over a century now. They could have done whatever it is they wanted to, be it revenge or whatever. So why?" There is one simple answer to that question.
