Claus

Claus is a character exclusive to the 2003 anime, who lived in a village that the Elric brothers visited at the start of the anime. When they first met her, she was rude and acted like a tomboy. However, after being saved by the Elrics from Majhal's evil scheme, she warmed up to them and became more feminine. Something that shocked both Ed and Al as they originally thought she was a boy.