In both anime and the original manga of Fullmetal Alchemist, Colonel Roy Mustang has consistently been one of the series' most beloved and iconic characters. At the same time, however, he's also one of its most self-serving.

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In his determination to become the next Führer of Amestris, Mustang has had to step on quite a few toes and break quite a handful of noses in order to rise to the top. Needless to say, he's not a character known for his kindness and compassion, but we love him anyway. Here is a compilation of 10 instances from all three iterations of the series in which Roy Mustang was a certifiable jerk.

10 Becoming A "Dog" of the Military (All Series)

Let's be real: even though Mustang first enrolled in the State Military Academy and then later became a State Alchemist to protect people, signing up for a corrupted force that has been used to wipe out certain groups and centralize the government under a military authority isn't a morally kind thing to do.

There's a reason Mustang's mentor, Berthold Hawkeye, wasn't happy when Mustang said he wanted to become a State Alchemist. By becoming one of the military's lapdogs, Mustang effectively made himself a human weapon.

9 Convincing a Child to Join Said Military, Too (All Series)

As if signing himself up to be a dog of the military wasn't enough, somehow Mustang thought it would be a good idea to encourage an 11-year-old who just made the biggest mistake of his life to also become a human weapon for the military's beck and call.

Granted, this conversation motivated and gave purpose to an extremely disheartened Edward, but really, it was still a jerk move on Mustang's part. In the 2003 anime, Mustang's reason for encouraging Edward to enlist was still ultimately self-serving:  if he was credited for finding and recruiting a young alchemic prodigy like Edward, it would help him rise to the top. Regardless, the bottom line is that being responsible for the creation of a child soldier is just plain wrong.

8 Using His Oxygen de Gentleman Strategy (Manga)

Roy Mustang is known for being a womanizer. At one point, in an omake strip that later became one of the most hilarious lines in the 2003 anime, Mustang declares that his first job as Führer will be to require all female officers to wear "tiny mini-skirts."

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Though his flirtatious reputation is dubious when ultimately, he uses it as a cover to hide his covert information smuggling, Mustang does, in another omake strip, use his ability to manipulate oxygen with his flame alchemy and cause a woman to faint. He then romantically catches her, sweeps her off her feet, and asks her out on a date. Yikes!

7 Baiting A 12-Year-Old To Catch A Terrorist Leader (2003 Anime)

The 2003 anime is different from the manga and the Brotherhood anime in the fact the entire first arc of the series after Liore and the Resembool flashback happen on Edward's way to his State Alchemist certification exam and during the exam itself. This means that when we get the manga's chapters about the train ride in which Ed and Al catch a terrorist leader and save General Hakuro, Ed is still only 12 years old and not yet part of the military.

This paints the train ride completely differently. In the 2003 anime, Mustang frames it as all part of a "test" that Edward successfully passes, but it doesn't change the fact that he manipulated a 12-year-old kid and used his eagerness to become a State Alchemist to bait him into putting himself in danger.

6 Lecturing Edward Coldly Post-Nina's Death (2003 Anime)

Keeping in mind that the first handful of episodes in the 2003 anime happen while Edward is still passing his State Alchemist certification exam and thus, is still only 12 years old, that means that he is younger than the manga and Brotherhood anime when Nina is horrifically murdered, too.

And instead of being reassuring or gentle, Mustang launches into a cold and unfeeling lecture about how the world is only going to get "uglier from here on out" and that Edward should just be glad it wasn't him and "get on with [his] life." There's even a moment where he approaches Ed and grabs his automail arm and Ed clearly flinches back in fear. It's definitely not Mustang's kindest moment.

5 Dragging Winry In Rope And Attacking Edward (2003 Anime)

In the 2003 anime, when Ed and Al are on the run from the military, it is none other than Mustang who has been ordered to capture them and bring them back for questioning. For a long time, it appears Mustang will unquestioningly do just that. He has Winry tied and dragged along as he ruthlessly attacks Ed and Al.

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Then, after stressing Winry out and convincing Ed and Al he's their enemy, Mustang finally reveals he's not there to fulfill the orders he was given. He's there because he's ticked off that Ed and Al didn't come to him for help. Honestly, it's a pretty cool speech; if only it didn't feel counterproductive when everything leading up to it had us wondering whether or not we could trust the guy in the first place.

4 Abandoning Everyone And Everything And Isolating Himself (Conquerer of Shamballa Movie)

Admittedly, after the events of the 2003 anime, Mustang has every right to feel guilty and depressed about how things turned out. Who wouldn't be? By the end of the series, Mustang has given up his ambition to become the next Führer.

In addition to that, however, he abandons everything he's ever built altogether. In the sequel movie, Conquerer of Shamballa, Mustang's guilt and disenchantment have resulted in him surrendering both his alchemy and his rank. He becomes an enlisted man in some random, distant outpost, a move that feels selfish and mean as we watch him coldly give up everything and everyone who he ever cared about in order to isolate himself.

3 Vengefully Rampaging Against Envy (Brotherhood Anime & Manga)

Roy Mustang angry

Mustang's most vulnerable moment in Brotherhood and the manga also provides one of the most memorable life lessons in the entire series. When he discovers Envy is Maes Hughes' murderer, immediately Mustang snaps into a vengeful rampage and goes to some pretty dark places.

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Literally, everyone wants Mustang to stop. Hawkeye aims her pistol at his head. Edward catches Envy and keeps him away from Mustang even when Mustang threatens to destroy his automail. Mustang's fury is intense and ruthless and it's only thanks to Hawkeye that Mustang backs down. However, even as Envy commits suicide afterwards, Mustang coldly calls him a "coward" in the silence. Geez, Mustang; jerkish much?

2 Killing Winry's Parents (2003 Anime)

Winry and Hawkeye Best Girl moral compass

In one of the sharpest departures from the original manga and Brotherhood, the 2003 anime takes the blame for the Rockbells' deaths from Scar and promptly places it on Mustang. Given the order and then required to follow it, Mustang is haunted by murdering the Rockbellsk from the beginning of the series to its end.

Even though theoretically, one would think Mustang could have said no, he acts like that wasn't possible. Fortunately, this moment is what prompts Mustang to become Führer in the first place, so he never has to follow unreasonable and cruel orders like that again.

1 Massacring Ishvalan People (All Series)

In every iteration of Fullmetal Alchemist, whether it be the original manga, the 2003 anime, or Brotherhood, Colonel Mustang always has one big, glaring Bad Thing he has done and that's his involvement in the Ishvalan Massacre.

He is known as the "Hero of Ishval," not because he saved Ishvalans, but because he used his flame alchemy to murder so many. Mustang's role in the systematic genocide of the Ishvalan people is probably his most jerkish moment, though "jerk" might not even be the best word for it.

At least he's trying to atone.

NEXT: Fullmetal Alchemist: 10 Things To Know About The Ishval Civil War