How to choose a suitable character to complete a cosplay?

This article is about the manga series. For the first anime adaptation, see Fullmetal Alchemist . For the live-action film, see Fullmetal Alchemist.
Fullmetal Alchemist is a Japanese shōnen manga series written and illustrated by Hiromu Arakawa. It was serialized in Square Enix's Monthly Shōnen Gangan magazine between August 2001 and June 2010; the publisher later collected the individual chapters into twenty-seven tankōbon volumes. The world of Fullmetal Alchemist is styled after the European Industrial Revolution. Set in a fictional universe in which alchemy is one of the most advanced scientific techniques, the story follows two alchemist brothers named Edward and Alphonse Elric, who are searching for the philosopher's stone to restore their bodies after a failed attempt to bring their mother back to life using alchemy.
Edward Elric is a fictional character and the protagonist of the Fullmetal Alchemist manga series created by Hiromu Arakawa. Edward, titled "Fullmetal Alchemist", is the youngest State Alchemist in the history of the fictional country of Amestris. His left leg was divinely severed in a failed attempt to resurrect his dead mother, and then his right arm was taken in exchange for his brother's soul. His missing limbs have been replaced with sophisticated prosthetics called automail . He and his younger brother, Alphonse, who lost his entire body and is spiritually bound to a suit of armor, scour the world in search of the Philosopher's Stone in the hopes of restoring their bodies. Edward has appeared in other media from the series, including video games, original video animations and light novels.Edward Elric cosplay costume is also very gorgeous.
Roy Mustang is a fictional character from the Fullmetal Alchemist manga series and its adaptations created by Hiromu Arakawa. In the series, Mustang is a State Alchemist of Amestris' State Military, as well as the superior of the series' protagonist, Edward Elric. Mustang holds the title of "Flame Alchemist" for his ability to create fire with alchemy, and he ambitiously strives to become the next leader of Amestris. Despite his ambition, as the series continues, Mustang decides to overthrow the State Military after his best friend, Maes Hughes, is killed by the homunculi, who are controlling the Military.
Besides his appearances in the manga and the anime, Mustang has also been featured in other media for the series, such as Makoto Inoue's light novels, the original video animations and the Fullmetal Alchemist video games. Since his introduction in the manga series, Mustang has been well received by readers, appearing second in each popularity poll for the series. His character has also received praise in various outside media, with many of them focusing on his character and development in both manga and anime.
Alphonse Elric is a fictional character and one of the protagonists in the Fullmetal Alchemist manga series and its adaptations created by Hiromu Arakawa. Alphonse is a child who lost his body during an alchemical experiment to bring his deceased mother back to life and had his soul attached to a suit of armor by his older brother Edward. As a result, Alphonse is almost invulnerable as long as the armor's seal is not erased, but is unable to feel anything. To recover their bodies, the Elrics travel around their country Amestris to obtain the Philosopher's Stone—an alchemical object that could restore them.
Winry Rockbelis a fictional character from Hiromu Arakawa's Fullmetal Alchemist manga series and its adaptations. Winry is a 15- to 16-year-old mechanic who often spends time with the central characters, brothers Edward and Alphonse Elric, who are childhood friends of hers. Specializing in mechanical repair, specifically prostheses called automail, Winry services Ed's replacement arm and leg. Originally meant to be introduced in the series' first chapters due to its lack of female characters, some of Winry's traits are based on Arakawa's own life.
With so many alchemist characters to choose from, you can make a reasonable choice from the style, character and style of your favorite cosplay costume.