Kouda is the teacher of one of the 3rd year classes at Shirokin. Not much from him stands out, aside from mostly seen helping Iwamoto's group trying to keep the boys in check. Aside from Yamaguchi, he's also the third male faculty member to wear glasses
Kouda sensei is one of the background characters. He;s often seen alongside Iwamoto and his group at the school; mostly to keep the boys in check. Though the students rarely take them seriously. But like the rest of the staff, he is protective of the students. When their school was accused of having thieves, Kouda was quick to defend his class. Though it caused some friction betwee him and Miss Fujiayama due to everyone bickering thinking it was a child from one of the other classes.
When Yamaguchi also made the chairman sign a contract to give them time to build the school's reputation in sports; he was also one of the many to volunteer. He volunteered to start a water polo team. Since he was an Olympic water polo champion.