A 2nd year middle school second year, Ayumi is one day asked out by Misao Zaitzu. Though she claimed she would accept any offer, she is consistently unsettled by Zaizu's monstrous appearance. However, she shows she can be somewhat caring as well as crafty. She is 152cm (4'9") tall and runs the second fastest in her class.
She shares a strong resemblance to Chinami Hashimoto, a character from another of Kawashita's work, Strawberry 100%.