When comparing the two brothers during the time Alphonse obtained the ability to use alchemy without a circle like Edward, Arakawa stated nobody was better at alchemy as the two had different preferences in the same way as other alchemist appearing in the series. Although she claims she has not thought of the characters' birthdates, Arakawa noted that she decided Edward's birthdate during the series' serialization. During a chapter in which it was mentioned that Edward was about to be 16, winter was about to begin in Hokkaido, Arakawa's birthplace, so it was decided Edward's birthdate would be in winter. In a common slapstick gag from the series, Edward is often struck by Winry Rockbell's wrench. While commenting that Edward has the ability to easily dodge her, Arakawa comments that he gets hit on purpose as a result of his personality. The director of the first anime series, Seiji Mizushima, says that in the development of the story Edward "evolves and devolves"; Mizushima comments that Edward is continuously overcoming inner struggles in order to determine how to grow up. The appearance of his automail in the anime is used to symbolize the intangibles of his character, making viewers note that Edward lost something important.