A/N: When you have certain dreams with certain anime characters you know you are obsessed beyond saving… I am... well... beyond saving, but that is beside the point.

Don't mind my Game of Thrones-themed title… it just happened to fit the story. This is actually an FMAB and Frozen crossover. Although set in my usual fem!Ed AU, no Fullmetal in this one, just Roy and his team with their usual shenanigans… Set somewhere after my story 'Predicament' I guess, but still before the start of the canon main story of FMAB, Ed is off wherever doing whatever with Al, not important in terms of this story…

Anyway… let's get started :D

Colonel Roy Mustang was sitting in his Eastern Command Center office at his desk reading over the latest report regarding Fullmetal's activities in these past few weeks. His brows were sternly furrowed through most of it but sometimes disappeared under his raven-haired bangs due to his surprise at the utter and complete ridiculousness of the things his youngest subordinate was capable of doing under the guise of an official military mission. A path of destruction followed in her wake usually. There went my budget up in flames again… Of course, it was always her superior's, aka his, responsibility to take care of it… Roy always made a point of telling the blonde off whenever he set his eyes on her. Money doesn't grow on trees you know!

At least he could always get a kick out of teasing her, about her height mostly, and as of recently – when they were strictly between themselves – her gender, and although he would never reveal her secret to others without her permission on purpose, it was just way too much fun to hang it over her head like the sword of Damocles. Unfortunately ever since finding out her identity he only had one chance to actually utilize this key piece of knowledge as the Fullmetal Alchemist was blissfully swamped with a myriad of missions and leads on the Philosopher's Stone and away from East City most of the time.

Sighing heavily he set the expense report down and signed off on it, putting it in the slowly – very, very slowly – growing pile of finished paperwork. Just then there was a light knock on the door and his trusted subordinate, Lt. Hawkeye stepped into the inner office.

"Sir, General Grumman has requested an urgent meeting with you at eleven hundred hours," she informed in her usual sharp and professional attitude. Her brown eyes were always a source of wonder for the Colonel, they told so much more than her words ever conveyed. At this moment in time though it was clear that his subordinate had no clue as to the reason for this unexpected summoning.

Glancing up at the clock Mustang saw that it was 10:54.

"That's awfully short notice," he frowned but got up from his desk anyway. The old general wouldn't have called upon him if it wasn't vital. Their more leisurely meetings that usually involved chess were always arranged well ahead of time. "Thank you, Lieutenant," Roy said nodding to her as he passed by her at the door and made his way towards the hallway.

In a very stiff, military fashion the Colonel strolled down the halls quickly towards his CO's office, knocking briefly before entering. Grumman's secretary just smiled at him gesturing for him to go right in.

"You called, Sir!" Mustang saluted and greeted the General as he entered the office.

"At ease, Colonel, have a seat," Grumman motioned with an unreadable smile towards the chair in front of his desk.

The raven-haired officer sat down uneasily, quite frankly eager to find out why he was called in. Sort of like when you get summoned to the principal's office at school. It usually wasn't a good sign. But he waited patiently for the older man to reveal his intentions at his own pace.

"You must be wondering why I asked for you so suddenly…" the General began twirling his overly large grey mustache between his left thumb and index finger. A nervous habit Roy knew Grumman had, so whatever the old man was about to say had to be something serious. "I was wondering… When are you going to finally marry my granddaughter?" he asked in an overly sweet, high-pitched voice no one would ever think was possible from an old man's mouth.

Mustang's eyes went wide in complete and utter shock and – let's be honest – disappointment, at which his CO chuckled lightly, seemingly enjoying a private joke.

"To be more serious," Grumman switched to his professional, unfazed gaze. "There is a potential international incident that the Führer personally requested you to handle," he added handing the Colonel the file containing the information.

Snapping out of his dumbfounded daze, Roy quickly took the materials given to him and scanned over the brief summary at the beginning.

"An ice castle appeared overnight in the Briggs mountain range just over our border?" Mustang asked in astonishment, doubting the source of the intel.

"Yes, it seems. Central suspects alchemical involvement," Grumman amended contemplatively.

"With all due respect, Sir, shouldn't someone closer to the site investigate it?" Roy inquired, his concerns wholly founded and shared by his superior too, given that the lack of field knowledge of the area would be a considerable hindrance.

Not to mention that Mustang absolutely despised everything wet, and snow was just a slightly colder rain in his mind, so he always avoided the northern regions whenever possible, but the Flame Alchemist was explicitly requested by the highest ranking man of the country.

"King Bradley seems to think that ice should be countered with flames. View it as an opportunity," Grumman smiled at his subordinate mischievously, being well aware of his ambitions even if not the full extent of them. "All the details should be in the file, you can take your team and any additional manpower you deem necessary for the mission just let me know the details. Dismissed."

"Yes, Sir!" Mustang saluted again as he stood up. Spinning around his heel, he marched out of the office to go back to his own.

"How did it go, Sir?" Riza asked Mustang the minute he walked in with that manila folder under his arm and a troubled expression on his face.

She wasn't worried that it was anything serious in terms of something that would be threatening towards the status of her superior, because she was sure that Grumman would have at least warned her or hinted at something beforehand. She was his granddaughter after all even if it was a highly unpublicized fact. Of course, Mustang knew nothing about this either – at least as far as Riza could ascertain, but given that Madame Christmas, Roy's aunt, and foster mother, was close with Grumman you could never know – since the familial connection was from her mother's side. Hawkeye had only recently been reunited with him anyway, well after her father's death and the time when Roy spent most of his days at their house as Bertold's apprentice.

"We have an assignment…" he began to brief his team when his phone at his desk started ringing. "I will explain in a second."

Frowning, he went to pick it up. There were only a handful of people who knew his direct extension, most calls usually came through the outer office and were patched in by Hawkeye.

"Colonel Mustang," he answered it in a severe tone.

"Oi, Roy! How's it going?" came the overly cheerful voice through the receiver that could only belong to a certain way-too-nosy-for-his-own-good intelligence officer from Central, which made Roy sigh exasperatedly.

"What do you want, Hughes?" Mustang asked in an annoyed tone. "I'm kinda busy."

Most of the time this was a convenient excuse to get out of the hours-long rant about his wife and daughter, but in this instance, there was actually a foundation for his claim.

"I know, I know, you gotta leave for North soon," the Lt. Colonel agreed with a hum. Roy rolled his eyes. Of course, Maes would know about the mission before he himself who was assigned to it was even briefed. "That's why I wanted to make sure to call you and tell you about Elicia before you left for who knows how long and then you would have to miss out on her latest milestones. She is already two can you imagine? She is just so adorable! She is talking more and more, Elicia is seriously a genius, her vocabulary grows by the day…" he ranted on without checking if anyone was actually listening on the other side.

"Go bother someone who actually cares!" Roy got finally fed up in the middle of the monologue and slammed the phone down with a little bit more force than necessary.

In reality, he adored his friend from Central very much, but it took a whole different kind of patience when he went on his spiel about his family.

Then the phone rang again. With a groan, Mustang picked it up because even though he was almost positive it was Maes again, you never knew…

"Colonel Mustang," Roy spoke professionally into the receiver.

"Oi, we got disconnected!" Hughes jovially replied, purposefully ignoring the fact that it was totally intentional on the onyx-eyed man's part.

"Hughes, I really can't talk right now," the Colonel huffed full of annoyance.

"About that mission," Hughes turned serious in that instant. "We just received intel that someone was spotted around that castle when it sprung from the earth yesterday late afternoon near our border with Arendelle. To be precise a blond woman. It seems she was alone, but the locals didn't dare to approach to investigate further. There was no activity spotted in the area after that, and it is highly unlikely that the person in question left the site since. You guys should be careful, if this was truly the work of one individual, then she is a highly capable alchemist, and we know nothing of her intentions."

"Thanks," Roy muttered, kind of dumbfounded by the sudden change in attitude, although he should have gotten used to it by now.

"Sooooo, when are you going to settle down and get a nice wife for yourself? Marriage is good for your health you know!" and he was back to his usual obnoxious self just as fast.

"Bye!" the Colonel slapped the receiver down again. Of course, everyone in the office was witness to the exchange as the door stood a little ajar given that he never closed it behind himself.

"Please don't damage military property, Sir," Hawkeye admonished him with a slight shake of her head.

As Riza was still sitting at her desk and not reaching for her gun, Roy knew he wasn't in any real trouble. The Lieutenant knew full well that the Lt. Colonel's calls always elicited some similar reaction from her CO, so she wasn't all that surprised.

Roy sighed and sat down to read the rest of the details in the file. It seemed that Hughes's intel was more up to date than what was known when the order was issued, which kind of made up for that whole ordeal on the phone. The folder also contained some basic information on Arendelle – that quite frankly he already knew from his days at the military academy – in case there really was a need for a diplomatic intervention as well. At this point in time, it wasn't determined yet if someone from Amestris had ventured too close to the border to play ice alchemist or someone from the neighboring country had breached their perimeter.

Arendelle was practically a city-state a bit farther into the Drachman territory, with only a thin strip of land connecting it to Amestris. As they were a peaceful nation with good trade relations with both Drachma and Amestris, neither really bothered with conquering it due to its minuscule territory and lack of resources. It was a monarchy, ruled by Queen Elsa, whose coronation according to the intel was just yesterday. Joyous news after the extended period that the country had had to endure without a ruler given that the then princess's parents died when Elsa and her younger sister were still children, and the parliament had taken over the governing duties until the older princess came of age. And that was all. Was all this a coincidence? The Colonel didn't think so.

Mustang really wished there was more information that they could actually go on regarding the mission. Contact information and name of the ambassador, if there was one, or any diplomat who was authorized to make decisions, customs of the royal court, required etiquette, the current state of their diplomatic affairs… anything that would help to clear this up if there was an international incident, but nothing of that sort was included.

When he looked up after studying every information carefully, Roy noticed that Riza glanced at him at the same time, so he motioned for her to come in with everyone else.

"As I mentioned before, we have a new mission that will take us to the North, east of Fort Briggs actually, to our border with Arendelle. Last evening an ice castle sprung from the earth, presumably the work of an alchemist. The situation is very sensitive given that we have no idea which side of the border the incident was initiated from, nor about the intentions of the individual behind it. Our job is to investigate and handle it accordingly, be it an internal or diplomatic issue. All of you are coming with me," he first addressed the whole team, briefing them in his most authoritative voice that he only used in situations like these and which always made everyone snap to attention at once, then gave out their individual orders.

"Lt. Hawkeye after this, speak with General Grumman with the information on what we need and contact North City and Fort Briggs to request their assistance. We will need an escort who is familiar with the field, preferably an alchemist, if possible with diplomatic ties to Arendelle or knowledge on their customs, anything. We would also like the support of the Briggs scouting team in terms of intel from the field."

"2nd Lt. Breda make arrangements for our travels. There should be a military supply train if I'm not mistaken northbound in the coming days, if not we will go by a civilian train, although that will take much longer. When done with that sketch out the possible scenarios of the situation and prepare a plan on how to deal with each."

"2nd Lt. Havoc and Sergeant Fuery compile an inventory and make the necessary preparations with North City and Fort Briggs for the equipment and weaponry we would need for the mission both reconnaissance and a potential military intervention."

"Warrant Officer Falman find out anything and everything you can about Arendelle by the time we leave and report back to me on the train. Any questions?"

Havoc raised his hand like there were in a classroom or something.

"Chief, why were we dispatched exactly? There are plenty of alchemists in North City too, who would be capable of handling the situation," Jean asked as he scratched his head in confusion.

"They just couldn't resist the charms of the Flame Alchemist in Central," Roy shrugged in an overly smug way that made Hawkeye groan in frustration and shake her head. "Anyway, get to work everyone, time is of the essence."

A/N: Okay, so I hope the whole military mumbo jumbo for the preparations and what would possibly be in a briefing file are not too out there to be unrealistic. I have no idea what goes on in the military but just tried to imagine what kind of roles Roy would assign to his various team members based on their specific talents.