Karen

One of the twelve sistes and usually featured as the heroine of them all, Karen is very sweet and kind, especially towards Wataru because she cherishes him. Karen is also quite mature and acts more like an older sister rather than a younger one. She is experienced and proficient at playing the piano. In the first anime, she is in the same year as Wataru due to advance placement. Like Hinato She refers to herself in the third person and addresses the brother as Onii-chan (お兄ちゃん）. It's implied in the anime that she may have romantic feelings for Wataru.