Mirai-mama is the mother of Mirai Momoyama and Hikari Momoyama. She co-owns and operates the family patisserie, Pâtisserie la pêche, with her husband, specializing in French-inspired pastries and desserts that reflect her culinary expertise and business management skills. Frequently seen working in the shop wearing an apron, she handles both customer service and kitchen duties. Her proficiency in French allows her to correctly pronounce the patisserie’s name and interact with customers, signaling a connection to French culinary traditions.

She sports a bob haircut and exhibits a high-energy, expressive demeanor. Her personality includes assertiveness, particularly when angered, during which she reveals a distinctive "Kira Smile"—a fierce, intimidating grin marked by intense sparkles. This trait is inherited by Mirai, though Mirai employs a gentler version to uplift others. In family interactions, Mirai-mama showcases multitasking abilities, balancing patisserie demands with household responsibilities and childcare.

Within the family dynamic, she actively manages daily routines, including caring for Hikari and supporting Mirai’s activities. Her practical guidance involves overseeing meals and school preparations, while her husband assists with household duties like laundry. The family resides in an apartment above the patisserie, integrating their home and work life. Her background includes a playful approach to naming, evidenced by her husband’s nickname "Mr. Whip," though its origin remains undetailed.