کاوریو سایتا

Year: Second Year

Zodiac sign: Pisces

Likes (in-character): Grape juice, Sachertorte, Vichyssoise (because they sound cool)

Likes (out-of-character): Mochi soup

Seta Kaoru is a second-year student at Haneoka Girls' High School and the guitarist of Hello, Happy World!. She is very popular with ladies, who she dubs her "little kittens." In particular, Uehara Himari and Rimi Ushigome have a tendency of blushing furiously in her presence. Outside of the band, she is also friends with Shirasagi Chisato.

She makes a cameo appearance in the third episode of the TV series.