is a character in Sailor Moon Crystal
Mayumi Osaka is Naru's mother. She is the proprietor of the OSA-P jewellery shop.
She has short wavy red hair and blue eyes. She wears a long sleeved black and yellow dress, black stockings and black high heals.
She wears fancy jewellery that includes small square black and yellow earrings, a brown beaded necklace, a white bracelet, and ring.
Morga assumes the form of Mayumi and leaves her bound and gagged in the basement of her shop. She is saved after Sailor Moon destroys Morga.