Despite her young age of 17, Hayasaka Ai can quickly switch between different personality types to suit various situations and scenarios.  In reality, she is just a kind-hearted girl who is deeply in love with her mistress Kaguya, whom she considers a sister.  She is also known to be very sensitive about the fact that she has never had any experience dating men. Hayasaka is also a level-headed maid who does all her duties well. Hayasaka has acquaintances Shirogane Miyuki, Chika, Iino, Ishigami.