Asuka Toyama

戸山明日香

aka Aa-chan

Asuka is [Kasumi](https://anilist.co/character/120229/Kasumi-Toyama)'s younger sister. Currently, she attends Haneoka Girls' High School and is classmates with [Ako](https://anilist.co/character/128144/Ako-Udagawa) and [Rokka](https://anilist.co/character/133744/Rokka-Asahi). She previously attended Hanasakigawa Girls' Junior High School, where she was in the same swimming club as [Yuri](https://anilist.co/character/152327/Yuri-Ushigome). Asuka is a year younger than Kasumi, although Asuka appears to be the more responsible one of the two. She is calm, level-headed, and tends to be sarcastic and bad at showing her affection towards her sister.