Ridel LeCoulte is an automail manufacturer in Rush Valley. He lives on the outskirts of town with his wife and father.

Ridel is introduced to the Elric brothers and Winry by Paninya in Chapter Eighteen when she takes them to see Dominic. When his wife goes into labor, his father is forced to go into town to find a doctor, only to find the bridge destroyed by lightning. Faced with no other options, Winry successfully delivers the baby herself.