Envious of Iron Work
He had been watching her ever since that one night. He kept her close enough to watch over her but far away where she didn't catch on to him.
The main reason he stayed close was because of the being that grew in her for those nine months a few years back. He wasn't expecting that to happen even after he heard her state over the phone to some old lady that she was pregnant; there was a strange feeling deep within him telling him to stay near her.
Then that day came. He heard her every cry of pain, and her labored breathing. He then heard one last cry and a sickening squish sound from within the room and a few minutes later, he heard the constant crying of a newborn. A boy to be exact.
But he had to push all of that behind him now. His mission was to kill the Elrics, and that meant every last one of them. The girl included. After all, she was his 'sister' and she got more attention than the brothers did. He eavesdropped for a reason, and he also played that false lead for a stone here in Lior where she now lived.
Besides, he didn't mind watching her as she worked under the most disgusting human he's ever seen. But her work with iron and metal is wonderful and her talents with alchemy outdo the chibi. Get them both on the wrong lines with each other and they'd kill each other in a heartbeat, keeping Envy's hands clean.
She'd be the perfect distraction to the brothers, giving him the chance to finally be rid of them all. That will only be the start. Then every human onward will follow. The plan was perfect… it was set.
Now all he has to do is wait for Fullmetal Pipsqueak to show up with that Hunk-of- Junk brother of his. It was a good thing he stalled the delivery of that letter she handed to him, thinking he was the mail carrier.
Oh, it was good to be him!