In the original: Winry is a sweet tomboy type mechanic that helps out the brothers and makes their automail, or metal prosthetics. She's supportive and kind but also has a tendency to lash out from time to time.
In ours: She's just as arrogant as Ed and the two almost have a rivalry over who is the bigger prodigy. She doesn't make automail to help people as much as satiate her own superiority and is constantly looking for the next challenge. Her tomboyishness still stays but it manifests in more lashing out and anger than in the original.