Animal in name: Horse (馬 = Uma)
Birthday: February 10
Height: 178 cm
Weight: 59 kg
Blood type: A
Favorite food: Cheese covered snacks
Interests: Collecting candy
Fear: A weird girl sits next to him
Suzume's friend and classmate. His exterior is cool and aloof but he is actually extremely shy when girls make any physical contact and blushes profusely. When Suzume discovers this, she "blackmails" him to become her first friend by threatening to tell other people his secret. Despite his frustration and annoyance, he agrees and thus makes his first female friend.
He finds it hard to talk to girls because there are no girls in his family; he only has a father and younger brother. Eventually, it becomes slightly easier for him to talk to them thanks to Suzume's influence. Yuyuka has a crush on him.
Mamura is normally very quiet and uninterested in his surroundings but gradually begins to notice everything about Suzume.