Kaoru Matsubara  

Buttercup, Powered Buttercup, 松原かおる

Kaoru transforms using the phrase "Powered Buttercup" and wields a Daruma Otoshi hammer. Similar to the original Buttercup, she's a tomboy who's easily enraged and known for her athleticism at school, playing tennis, practicing martial arts, and numerous other activities. She excels in soccer due to her strengthened determination after receiving new soccer cleats when younger. This popularity has attracted many fangirls, much to her dismay. Despite this, she dislikes "girly" girls like Momoko and Miyako, and hates skirts, making her the most reluctant of the group. However, in later episodes, Kaoru begins to care about Momoko and Miyako and is no longer hesitant to join them in their activities. She speaks with a tough and masculine tone and rarely uses honorifics when communicating. Her greatest fear is ghosts. Kaoru lives with her father, who's a professional masked-wrestler, mother, two brothers (one older and one younger), and is represented by stars.