Yukie is an adult woman. She has short brown hair and green eyes. She wears a yellow dress and a darker yellow long-sleeved jacket, embroidered with leaves.
Yukie is dissatisfied with her husband's repeated transfers due to company downsizing. The stress of having to move around have left her emotionally unstable. Her daughter, Mayu, is the apple of her eye. She has always been doting on Mayu and buys a lot of things for her when she goes shopping.
Yukie solely appears in her daughter's flashback at the beginning of the fourth chapter, where she apologizes for the change of school that Mayu has to undergo, but the latter replied that there are no problems (though she's upset by this).