|Family||Yozora Shizumori (younger sister)|
|Voice Actress||Kazuyuki Okitsu|
Kyousuke Shizumori is a minor character in the series. He is the older brother of Yozora Shizumori.
Kyousuke has black hair and mahogany eyes with glasses. He normally wears a light blue shirt with an off-white pullover, long gray pants and black dress shoes.
He is generally very kind and understanding to other people, especially to his sister, Yozora, mainly due to her ill health. He is also very calm, but can be serious about certain things, such as his studies. However, he can also be frightening when angered, but it is not usually shown. Yozora calls him by the respectful term "nii-sama" (兄さま nīsama).
Yozora Shizumori - His younger sister. He accepted the blame when she collasped outside Prism Stone after first going to PriPara. He cares deeply for her and is quick to anger when she is involved.
Shizumori: Shizumori can be split into two parts. Shizu (静) meaning silent and mori (森) meaning forest.
Kyousuke: Kyousuke means respected.
- Like his sister, he is trained to use all traditional Japanese weapons and practices several forms of martial arts.