The official website for the Gundam Build Fighters anime revealed the cast and character profiles for the anime on Friday:
Kotono Mitsuishi (Sailor Moon, Kaleido Star) plays Rinko Iori, Sei's mother and the owner of the Iori Model Shop. Even though she is the owner, she is not very knowledgeable about plastic models, and relies on her son for advice about them. Her specialty is cooking, and her best dish is stir-fried vegetables.