Envy's Angel

A girl that wants to have her mother back from the dead. She hopes that alchemy will do the trick, but finding it hard to understand. She finds the symbols that use interesting. Then one day something happens to her.
The father of the homunculus wants her alive for is plan for more power. He orders Envy to keep an eye on her but then later on orders him to be her bodyguard. What is Father's plan for her? Something is different about this girl. What could it be?

What happens when Envy is ordered to watch over the girl. Why does this girl know things that no one knows about him? Envy can't figure out why she is not scared of him.

I want to thank @Envy_theJealous for all the help that you are doing with me on this story.