|Relatives||Kasugano Iona (mother)|
Kasugano Yukito (father)
Kasugano Kaori (older sister)
Kasugano Stella (twin sister)
|Season||Pretty Cure 5☆Reborn|
Kasugano Ken (春日野ケン Kasugano Ken) and his sister Stella are twins and Kaori's younger siblings. He is outgoing and fun, with a confident nature. He shares a strong bond with his sister, and their older sister will do anything in her power to protect them.
Ken has tidy brown hair and brown eyes. He usually wears a yellow shirt and white shorts, and a yellow wristband. He also wears white sneakers.
Ken is shown to be quite outgoing, and is also handsome. His mother takes many photos of him and his sister, in the hopes of them becoming famous. He is also very fun and confident, unlike her older sister, Kaori. He also has to work at the Oishii Tabemono Restaurant.
Ken first appears when Kaori enters the Oishii Tabemono Restaurant, and was at the counter, drinking a milkshake, while his sister Stella was reading a book. When Kaori explained her problem to her mother, Ken said that she should write a story about him (with Stella rolling her eyes), which Kaori quickly refused. Stella then says, "Mother used to be a reporter. Ask her.", and Kaori does.