Ed's younger brother by only a year, he and the older Elric are very close. He is the calmer of the two and is usually the more peaceable one, trying to calm his brother down in rough situations, especially when Ed gets called a short insult.
Alphonse is essentially a calm young man who holds his older brother Edward in high esteem (as most younger brothers do) and would do anything for him, including sacrifice his own life to save his brother’s, and the two of them are almost inseparable--unless, of course, they get into an argument, but they always make up afterwards. He is usually the one who calms the elder Elric down when Ed gets called a short insult and is the peacemaker of the duo, resolving situations that would otherwise erupt into a fight in a more calm manner than would his brother. He is also the one that, whenever Ed happens to give up on something, is the one to encourage the elder Elric brother to keep going, even when the going gets tough.
He is often mistaken as shy because of the fact that he tends to stay quiet most of the time, but is not afraid to speak his mind to his brother if ever the chance comes (although this often results in arguments between the two, but that is to be expected with brothers). He strives to be as good of an alchemist as Ed and to be (almost) as outspoken as his brother is.
Alphonse is usually equipped with his fighting skills--of which, out of the two brothers, he is the better at--and his knowledge of alchemy. Oh, and of course, his brother Ed, who often helps him out in tough situations with his own arsenal.
Al and Ed share a very difficult past. Hoenheim of Light, Ed and Al’s father, left when they were still at an early age, although Al was still much too young to remember that day, and because of that as well as a serious illness, their mother, Trisha Elric, died when Ed was eight and Al was seven. The brothers attempted to bring back their mother not long after that, but failed miserably, instead causing Al to lose his entire body and Ed to lose his left leg. Ed then sacrificed his right arm in order to seal Al’s soul into a suit of armor. Ed and Al both applied for jobs at State Alchemists, but Al eventually had to drop out due to the fact that he was a hollow suit of armor, and the two then set out to find the legendary Philosopher’s Stone in order to return their bodies back to normal. They ended up succeeding and getting Al’s body back but Al lost his memory of having been in the suit of armor in the process, Ed getting it back later on.