Kana Asumi
For the first season, the opening theme is by Yuka Iguchi and Kana Asumi. For the second season, the opening theme for the first 15 episodes is by Iguchi, Asumi, Yōko Hikasa, and Yui Ogura, while the theme for episode 16 onwards is by Iguchi and Asumi. The ending theme for the first twelve episodes is "Tinkling Smile" by Ogura, the ending theme for episodes 13-15 is by Iguchi and Asumi, the ending theme for episode 16-24 is "Cocoiro Rainbow" by Kyouko Narumi, and the ending theme for episode 25 is . For the OVA, the main theme is by Iguchi and Asumi. For the third season, the opening theme is by Iguchi, Asumi, Hikasa, and Ogura, while the ending theme is by Iguchi and Asumi.