Yaya Yuiki (結木 やや, Yuiki Yaya?) Voiced by: Tomoko Nakamura
A childish and spoiled girl serving as the A-Chair (Ace Chair), she is one year junior to Amu. Yaya often acts too immature for her age, such as having an enormous sweet tooth, a great soft spot for items like ribbons as well as tending to be hyperactive. She is also a ballerina, though a rather clumsy one. She has a newborn baby brother named Tsubasa, who, she claims, gets all her parents' attention. It is because of this that her Guardian Character, Pepe, who is a baby, was born. Though she acts jealous around Tsubasa, Yaya does have a responsible side, once personally taking him to the doctor when he had a fever, as no other option was possible.
Her Character Change character is a baby that uses a giant rattle and a milk bottle as weapons; influenced by the "baby" character, she has a crybaby personality. Pepe says "Pretty, Cutie, Love Baby!" during a Character Change with Yaya. She was later able to do a Character Transformation called "Dear Baby," but due to her lack of maturity, often receives the end of her attacks.
I can't hear you over your stupidity.