A student council member named Haruka is known for being impulsive and talkative. Despite this, she strongly believes in doing what's right and works hard to improve the school. She often competes with Fujino Shizuru, trying to prove herself as a better leader, but her efforts usually backfire. It's common for Haruka to make mistakes when using language, which Yukino frequently corrects. Despite their differences in personality, Haruka and Yukino have been close friends for a long time, with Yukino looking up to Haruka as a mentor and protector.