Harry Potter/Full Metal Alchemist

Erika Mustang

Summary:Erika Potter had been raised as Roy Mustang's little sister who has been known to scare Roy,she is also known as the Crystal Ice alchemist

Pairing:Erika/Edward

Chapter 1

The day had started out nice and sunny,Roy Mustang was in his office trying to do his paperwork when he got a phone call"Hello""Hey big brother guess what, I'm going to come and visit you for a while."Then Roy paled and his door opened there stood Edward and Alphonse Elric when Edward said"Hey colonel why are you soo pale huh?"Then Roy said "Oh really Erika that's great when will you be here?""Why Big brother I'll be there in just half an hour of course, will you have someone come and pick me up at the train station?""Of course Erika see you soon.""Bye big brother."

Then he hung up the phone and banged his head on the desk repeatedly when his lieutenant said"Quite banging your head on your desk sir,oh hello full metal what brings you by.""Other then a mission nothing much, what 's wrong with the colonel?""His little sister Erika just called to say that she was coming to Central for awhile and well the colonel is a little scared of his sister."

Then Roy said"Full Metal I want you to go and pick up my sister and bring her here safely.""heh! why me why not someone else colonel bastard?""Because everyone else is busy and your not so get going Full metal.""Fine bastard colonel." When Edward and his brother was gone Roy looked panicked and decided to hid under his desk so that his sister doesn't see him when his crew saw where he was they shook there heads at him.A while latter Ed and Al where waiting at the train station for Mustang's sister when the train pulled in and the doors opened and a girl that stepped out had long black hair down to her knee and bright green eyes and pale skin as well all and all to Edward she was the most beautiful girl that he had seen.

Then she went to them and asked"Are you two here to take me to my brother?""We are indeed miss.""Oh now miss,just call me Erika so has my idiot brother done anything stupid since I haven't been by his side?""Not that we know of."Said Edward"We just joined the military ourselves.""Oh I see,well I must say that your quite handsome for someone who just joined.""Huh Thank you."Edward blushed at the complement ,then Alphonse commented"well the colonel had asked us to escort you t his office s if you would follow us please Erika?"

Then off they went when Erika asked"So what trouble has my brother gotten in to ?""That I'm afraid you'll have to ask him when you see him.""Oh trust me when I say I will." She said with a glare,when the company finally reached said office when Ericka then said"ROY."Roy then paled and started to find a hidding spot,then he heard a calm voice behind him say"Why hello there big brother I haven't had one phone call from you or a letter care to tell me why?""Erika may how you grown and you look so beautiful as well ehehehehe." Roy said while he was scratching the back of his neck looking everywhere but at his sister who had a bit of a scary calm look on her face.

Erika then said"And to top it all of you didn't even have the guts to come and greet me yourself,NO instead you had these two nice young men to come and hmm how was it that you put it Alphonse? oh yes "escort"me to your office,just wait until I tell our mother Roy and I noticed that you haven't been doing your paperwork have you! bet you have been pushing it on to poor Riza why puts up with you I don't know, well what do you have to say for yourself hmmmmm?"

She then turned and saw that they had gotten quite an audience then she said"Well there is nothing to see here people get back work the show is over now school!."when a corporal came and said"Uh sir there is someone here wanting to speak to you sir."Then Roy cleared his throat and said"Let him in Corporal lets us hear what he has to say.""Sir yes sir."The corporal then went to get the guest and everyone in Roy's office found a seat and sat to wait and with a few minutes later the corporal came in with a old man that had to be colorblind,a old lady in what appears to be a dress in green and black colors and lastly a young man that has black hair,black eyes and black cloths.

Roy turned and sat down at his desk and folded his fingers together and then placed his chin on top of them and looked boredly at them and said"Who are you and what do you want?""Well my dear boy, my name is Albus Dumbledore this here beside me is Minerva Mcgonagall and Severus Snape."Roy's eyebrow twitched at the "my boy" comment then he hear sister and the Elrics sniggered at the comment then Roy said"My name is colonel Roy Mustang with me are Riza Hawkeye,Edward and Alphonse Elric and my sister Erika Mustang we are known as Alchemists."

Then Dumbledore said"Well my dear boy we are here for your for she was Erika Potter, she is the girl-who-lived our saviour she saved us from a man known as Voldemort she is the wizarding worlds savior."That Roy glare at him when he said that he was here for his little sister he was not going to take at all and by the looks of it northern were were men or the Elrics then he said"One you are not getting MY sister,secondly I don't care about this Voldemort at all."Severus had to smirk at that,that someone is willingly turning the old man down is all right in his books also the man is willingly protecting Lily's only daughter as professor McGonagall she was a bit cross with the man who told Albus no,will at the same time she held respect for him because of it and that he was protecting Erika as Dumbledore he was pissed that someone denied him of what he wanted and that was his weapon.

Then Severus said"Headmaster perhaps I could stay here and help miss Mustang how to use her magic,get her all caught up with her peers." Then Dumbledore thought"This is perfect I can use Severus's hatred of her father and have him turn it into James daughter." Dumbledore had thought with a smirk and said"A excellent idea my boy, you can stay and train miss Potter in her magic."At that Roy and Erika glared at the headmaster for not using her perfered last name for she have never knew her last name was Potter until now but that is not going to change so Erika said"Headmaster my last name and don't care what you say about it is Mustang it's what I grew up with and I expect you to call me by it."

Then Dumbledore placed his hands up like in surrender and said"Of course my dear we'll call you by your chosen name if you would like."Erika then nodded with a scowl on her face and with her arms crossed over her chest and she was standing beside her brother when she said"Oh and you'll will also address me as Colonel as well I did just get promoted after all I now have my own crew just like my brother.""Colonel, but you are sooo young though."said Mcgonagall,then Erika said"Ah but time flows differently here professor,I am 19 and my brother is 29 and we've both in a war or two when we first joined the military,after all that's how I lost my arm as well."

That news shocked the two wizard's and the one witch,then Dumbledore said"So how can you still use your arm then my dear?""Why auto-mail of course."Said Erika as she took off the one side of her coat and shirt to showed them the metal arm, Erika then put her shirt and coat back on and turned to Roy and said"Well Roy now that I'm here I can visit you more,but sadly I must go and find my new office and my second in command as well see you all later."Dumbledore said"Wait you can't leave yet you have to be trained in magic.""Headmaster I am a Colonel, and I must go and meet with my crew and get to know them so I must leave."She then turned to Severus and said"If you would like you could come with me as well."Severus then nodded his head and started to follow her into the hallway.

As they went down the hall just a few doors down,they went into the room when everyone stood up and saluted her and said"Ma'am."Then Erika saluted back and said"Stand down men,I am your new commander my name is Erika Mustang,yes I am the younger sister to Roy Mustang,now who happens to be my second in command?"Then a middle-aged man stood up and said"I am ma'am my name is Simon Smith ma'am."Erika then smiled at the man and said"It is a pleasure to meet you lieutenant beside me is one Severus Snape he is here to teach me magic,since apparently I was born with it and on the command of the Fuhrer I must go and help them with this mad man that apparently killed my birth parents."

Then one of her men stood and asked"Ma'am will one of us go with you to protect you?""I don't actually need it but the students might,so you can talk among yourselves to see who wants to come with me,I know that my brother and maybe the fullmetal will come with me."Then Erika and Severus walked into her office and she sat down at her own desk.