Friends and AlliesEdit
Shizuno is a classmate and friend of Satsuki. Satsuki is often the target of Shizuno's perverted anctics, while it not specifically targetting her, that being Moroha, this make Satsuki jealous in terms of breast size.
The two often tend to argue, with Shizuno always winning every single one, but regardless, both show to actually get along well as Shizuno became the second person Satsuki exchanged emails with.
They seem to be good friends.
Satsuki often argues with Leshya, especially when the latter calls Moroha, Ani. When they first met, Satsuki immediately disliked her, because Leshya was after Moroha. She often argued with her, usually resulting in her loss, similar to the way she loses to Shizuno. Satsuki is also jealous of Leshya because of her large breast size.
After Moroha saved Leshya, Satsuki and Leshya argued on who would be Moroha's younger sister. Satsuki wanted to be the only younger sister, even saying that Leshya could be Moroha's older sister. However, Leshya rejected the idea, stating she wanted to be the younger sister. These arguments usually lead to competitions between the two, which often go out of hand.