She is voiced by Shizuka Itō in the Japanese version of the anime and Cherami Leigh in the English version.
Himawari appears as a beautiful young girl with a slender figure. She wears her uniform most of the time and is rarely seen with another clothing, except for kimonos. When she is not wearing her uniform, she usually chooses to wear one-piece dresses of a single color in its different shades. She has a long curly hair which ends under her waist tied in two pigtails since she was a child.
As the series progresses, Himawari continues to grow and develops a more shapely body and still uses the same choice for clothing. She changes her signature pigtails and instead let goes her hair to cover the scars on her back.
She always smiles and keeps a positive attitude to the point that when she watches Watanuki and Doumeki fighting, she thinks they are playing together. Later on the series, it´s revealed that she always keeps her smile even when she is saying something really disturbing to hide the fact that everyone who becomes her company or aquaintance ends in disaster. She always show an innocent mind but she is more mature than Watanuki and understand his feelings about her since they met and when Doumeki or Watanuki says something complicated, she clarifies it.
- Ever since she was born, she was cursed with bad luck that affected everyone around her. The only people would be immune to Himawari's bad luck would be her parents as they brought her into the world, but both are already deceased.