Sadamatsu Minatogawa  

, 湊川 貞松

Sadamatsu is the only member of the Flower Arranging Club at the academy, so he doesn't have many friends to interact with. Instead, he spends his time taking care of and talking to the garden. Despite appearing sad, helpless, and lonely due to this, he becomes happy whenever someone approaches him and engages in conversation. Sadamatsu is an introverted person who always maintains a serious expression on his face. However, when someone joins his club or when he gets interviewed, his demeanor slightly changes to one of delight. He is known for being elusive and not standing out, often biting his handkerchief in disappointment. As a child, he collected plushies, and even now, he enjoys tea, bringing a cup with him everywhere, just like Kyoma's love for milk.