^^ Claudine made Mahiru flustered by doing this exact thing in the anime, and Claudine also did a sort of similar thing to Maya, too, but that was then they performed Starlight and Maya outstretched her hand to Claudine and Claudine looked at it and went up to Maya's ear and said,
It's like a call and response. You know, the kind you see at idol concerts. A cliche you come to love and expect
The Call: Sayo x Tsugu
The Response: SAAAAAAAAYYYYYYYOOOOOOOOOOOOTTTTTSSSSUUUUUUUGGGGUUUUUUUUUUU