Shōta is Kaede's ex-boyfriend, known for his flippant and nonchalant attitude. He consistently appears with a smile, providing a relaxed counterpoint to Kaede's easily annoyed nature. His easygoing personality allows him to quickly form a friendship with the dinosaur living with Kaede. This bond leads him to spend frequent time with the dinosaur, often causing Kaede chagrin or embarrassment.

His interactions include accompanying Kaede and the dinosaur on shopping trips and other routine activities, as referenced in episode titles about their shared experiences. He notably participates in the dinosaur's birthday celebration, highlighting his integration into their daily life. Shōta also engages in casual social activities like playing cards, reflecting his laid-back approach to relationships and leisure. His role remains a supportive figure within the central trio, contributing to scenarios exploring cohabitation dynamics and unconventional friendships.