Yaya Aizawa is a side character in the yuri series Hidan no Aria AA.The twin sister of Yuyu who are 1st year Assault students of Tokyo Butei High. They follow Urara Takachiho as her servants.
- Faithful to Urara she judged Akari acting like a thieving cat, because Akari is by Aria's side most of the time.
- Getting excited in a pink hearty background in which she held hands with Yuyu, she admired how Urara can be a slave driver with completely treating them like tools for her ambitions to get close to Akari, that indicated that they have a streak of masochism.
- For a certain reason, she kept staring at Akari who arrived to Takachiho residence.
- She blushed when Urara was spanking Yuyu's hips to release her fury on the loss of opportunity to have Akari all to herself in the water park.
- She displayed Urara's owned poster of Akari's special shrinking bathing suit for Shino to witness.
- Urara's confidence is what she find to be so wonderful that her hands interlocked with her twin, along with some moving pink hearts for their background.
- With persistence she wished to come with Urara to battle Kyouchikutou, unless Urara did order them to go cooperate with Kirin to bring Hina to safety, then after discovering the reason behind Urara's order to be of her purpose to keep the Aizawa twins out of danger, they both admired her and made her embarrassed.
- If a trouble concerning Urara's plan to get Akari away from Aria was on its way she welcomed it while forming a heart sign with her arms along with her twin.
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