Ed and Al aren't the only Elric children, they have an adopted sister, Lilith Elric. She was sent to them by Hoenhime, but Ed and Al did not know this until their mother's death. Ed hated Lilith after that. When Ed and Al tried to bring back Trisha, Lilith tried to stop them but Ed wouldn't listen. When Colonel Mustang appears searching for Hoenhime after Ed and Al survive human transmutation he doesn't leave alone. Without informing anyone Lilith goes with Mustang to become "The Youngest State Alchemist".
A slight rapping on the door made Trisha Elric pause in the middle of chopping vegetables for the night's dinner. Wiping her hands on her apron Trisha walked over to open the door. Ed and Al were out playing with Winry so they weren't there to answer it. Trisha opened the door to find a small girl standing on her porch, "Hello, Mrs. Elric." The girl mumbled nervously. She seemed to be about four, Ed's age, and had wavy chestnut colored hair paired with vivid, deep blue eyes.
"Hello sweetheart, what can I do for you?" Trisha asked with a smile. The mysterious girl just looked down and swiftly held up her small hand clutching an envelope addressed to Trisha Elric. Trisha examined the envelope and found scrolled on the back, Love Hoenhime, and her eyes bulged out of her head, "Why don't you come in." She said leading the little girl inside. What's happening, Trisha thought. He sent this young girl but yet he didn't come back? What will the boy's do when they find out? Oh, dear lord. She quickly opened the envelope and read it, as the little girl sat on a couch.
DearTrisha,
I am truly sorry for not contacting you in the last year or so, I really do miss you and the boys. So I guess you're wandering about this little girl with this letter. I'm sorry for putting this upon you but she is only five, she is an orphan that was abandoned on the street, her name is Lilith. She is shy and fragile, but she has potential as an Alchemist, who knows, maybe she can show the boys some things. I was hoping that you would be able to take her in, I would not ask you to do this if I did not feel it was very important. Lilith is very special, she has Alchemic power that even I cannot comprehend. I hope that you do not feel as if I am mistreating you, I love you and the boys, and I miss you too, I just, can't come back yet. But I promise that I will be back for you, Ed, and Al. So please, watch over Lilith, she really wants a family, I told her about you and she thinks that she will like you, I do hope so.
With Love,
Hoenhime
P.S. I love you, and please treat Lilith like our daughter.
It took a minute for Trisha to absorb what the letter was saying, and then she sat down across from the girl. "So, your name's Lilith?" She asked nervously. Lilith nodded. "Um… Lilith… are you hungry?" Another nodded. "Ok then, um, do you like carrots?" And again the young girl nodded without a word. "Ok, do you have anything with you?" she shook her head. "Alright, I'll go get some carrots and then I'll show you your room." Trisha walked to the kitchen in a daze, what was she going to do? She couldn't tell the boys that their father sent her, they'd be so upset, maybe I'll just tell them after they get to know her, Trisha thought, then they won't so upset… hopefully.
Then Lilith walked over to her and lightly tugged on Trisha's apron, waking her up from her thoughts, "Can I nap on the couch?" she whispered.
"Um, sure. Do want to have carrots first?" Lilith shook her head. "Ok, would you like a pillow Lilith?" she shook her head again. "Alrighty, go on ahead." Lilith shuffled over to the couch, laid down, and fell asleep. The poor girl must be exhausted, I hope she sleeps well.