Isaac McDougal

Isaac McDougal, A.K.A. Freezing Alchemist, is an original character exclusive to the 2009 series, Fullmetal Alchemist: Brotherhood. He appears in the first episode as a former State Alchemist in the military who is currently trying to destroy Central. After killing a few soldiers with his water alchemy, he activates a transmutation circle to create a large amount of ice. He is then confronted by the Elric Brothers and (after confusing Alphonse for Edward and accidentally making fun of Ed's height) is defeated and handcuffed. He quickly escapes after creating steam from a puddle as a diversion.

He later goes to prison to try and enlist Solf J. Kimblee in his plan to destroy Central, but is unsuccessful. Returning to the city, he encounters Roy Mustang, and quickly escapes him after dousing him with water. He makes his way back to the alley he originally started at and activates all the transmutation circles around the city, creating a giant wall of ice traveling towards Central. Al, Ed, and Alex Louis Armstrong all try to stop him but are unsuccessful. but once Al and Ed get the upper hand in close combat, he is knocked off and is seriously injured. In desperation, he uses his blood as a weapon to distract the Elrics so he can get away. After turning down an alley, he confronts Führer King Bradley who, with a slice from his sword, kills Isaac.

He is also mentioned in episode 2 during a report by Colonel Mustang, and is seen again in episode 30 during his time as a state alchemist in Ishval. In episode 35, Ed remembers about him and understands that he was aware of the secret plan of the Military.

Trivia

 * Though having a short appearance in the show, he hints to the supposed evil activity of the Fuhrer and the Military, possibly already knowing that Bradley is a Homunculus or that they were just using Amestris as a Transmutation circle. The latter is more likely, considering that he attempted to kill the Fuhrer using mundane means.