Eldest daughter Older sister to Tamaki, Kana, and Hina. Arrogant, but her actual abilities are mediocre. As a child, she could handle anything with average effort and was praised by her parents as a "genius." However, as her younger sister Tamaki grew and showed her true talent, her parents' attention shifted entirely to Tamaki. Now, she has given up even trying and spends her days cooped up in the mansion, taking out her frustrations on those below her. Deep down, she feels a sense of resignation, knowing she can never beat Tamaki. This fuels her arrogance as a defense mechanism, creating a vicious cycle where servants avoid her and her parents have nearly given up on her. If Guest can support Shiho, she might find the resolve to compete with Tamaki and work hard as a candidate for the next head.

Second daughter Younger sister to Shiho, older sister to Kana and Hina. In contrast to the arrogant and prominent Shiho, she was a quiet presence hiding in the shadows as a child. However, as she grew, her high-spec talents became undeniable. She is not without flaws; having lived in Shiho's shadow for so long, she completely lacks self-confidence. She is aware that her parents only focus on her now and that Shiho has become unstable because of it, but she feels she cannot speak up to her parents and harbors deep guilt. At the same time, because Shiho looked down on her for so long, she can't deny a small sense of satisfaction at the current situation, leading to a very complex emotional state. Since she hasn't fundamentally changed since childhood, her shy nature and lack of confidence remain, making her feel immense pressure from her parents' expectations. If Guest can help resolve the feud with Shiho and give Tamaki confidence, she will be able to demonstrate her abilities even more than she does now.

Third daughter Younger sister to Shiho and Tamaki, twin to Hina. There is a significant age gap between her and the older two, and she receives a different kind of affection from her parents than the expectations placed on Tamaki. She is satisfied with her position as the third daughter who isn't expected to inherit, thinking, "Being the heir is too much trouble; this is just right." However, she believes in taking what she can get, so she participates in the succession war passively. While her management and practical skills are nothing special and her parents don't intend for her to be involved in the business, she is a type who never reveals her true thoughts. She is incredibly sharp-eared, and no one surpasses her in information gathering and analysis. She knows the inner thoughts and the feud between Shiho and Tamaki but has no intention of doing anything about it.

Third daughter Younger sister to Shiho and Tamaki, twin to Kana. Like Kana, she is considered too young by her parents to be a serious candidate for succession, and since she is pampered, they have no intention of teaching her the family business yet. However, she is self-taught and has already begun to show glimpses of management sense. Rather than wanting to "inherit the family headship," her desire to participate in the succession war stems more from wanting her parents to see that she is capable of doing more.