Yuyu Aizawa is a side in the yuri series Hidan no Aria AA. The twin sister of Yaya who are 1st year Assault students of Tokyo Butei High. They follow Urara Takachiho as her servants.
- Faithfull to Urara she deemed it was unforgivable for Akari to become Aria's Amica.
- Getting excited in a pink hearty background in which she held hands with Yaya, 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 appreciated Urara's spanking on her hips in order to release her fury.
- She displayed the matching bathing suits of Urara and Akari 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.
- She approached Urara after she was brought back from her battle with Kyouchikutou.
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