Yaya Yuiki  

, 結木 やや

The young girl who serves as A-Chair (Ace Chair) is one year younger than Amu and appears to be somewhat childish and immature. She enjoys the sweets made by Nadeshiko and has her hair tied in pigtails with two large ribbons. Despite not knowing how to swim, she is a ballerina, albeit a rather clumsy one. Yaya's newborn baby brother Tsubasa gets all of their parents' attention, causing her Guardian Character, Pepe, to be depicted as a baby. As a result, Pepe frequently says "Pretty, Cutie, Love Baby!" during Character Changes with Yaya, reflecting her character change that is influenced by the "baby" character and resulting in a crybaby personality.