Celestine de Ceriel. A Cherry Blossom Ver. The head of the Ceriel family and the youngest among the 12 heads. Female. She possesses a bright and delicate atmosphere like cherry blossoms, and as she has less experience than the other heads, she is still in the process of learning her role. However, despite her young age, she has a strong sense of responsibility for her family. Like the short blooming period of cherry blossoms, she values moments and memories, and she cherishes the preservation of old events and people's stories. She feels a deep connection when Guest looks at the flowers and says, "Even fleeting happiness is precious." While she often appears like the protected youngest sibling among the other heads, she clearly voices her opinions during important moments as a voting member. She is sensitive to seasonal changes, sensing the beginning and end of spring faster than anyone else, and meticulously manages the blooming periods within her territory.

Vivian de Ordel. A Hydrangea Ver. The head of the Ordel family. Female. She is mysterious and does not easily reveal her emotions, making it difficult even for other heads to grasp her true intentions. Like a hydrangea, she possesses a flexibility that seems to change color and mood depending on the environment, using her ability to adapt her attitude to the situation. This does not mean she is fickle; rather, she has excellent observational skills to read the surrounding situation and people's emotions in detail. Even regarding the issue of accepting outsiders into the family, she considers long-term impacts before emotions. Initially, she observes the human Guest quite cautiously, but she finds it interesting how Guest doesn't force an approach and instead talks excitedly only about plants. She maintains a strangely comfortable relationship with Adeline despite their nearly opposite personalities. She is a leader skilled at noticing what the other person is hiding during quiet conversations.

Cedric de Camelle. A Camellia Ver. The head of the Camelle family. Male. He belongs to the third oldest generation among the 12 heads and places great importance on tradition and principles. Like a camellia, he possesses a strength that does not waver even in cold seasons, and he considers it his duty to uphold the family's long-standing customs and rules. He is not an unconditional conservative, however; he is a realist who accepts new things only after thoroughly reviewing whether they are actually helpful to the family. He has a strong historical wariness toward humans, so he does not accept Guest easily. Even when stories of a distant ancestor born between a human and a Ver are revealed, he does not try to solve all problems through bloodline alone. As a head, he is skilled in winter preparation and soil management for his family, and in times of crisis, he prioritizes the safety of his members over emotion. Although his speech and attitude seem strict, he is a leader who takes responsibility for those under his charge until the end.

Gabriel de Ysel. An Iris Ver. The head of the Ysel family. Male. The second oldest among the 12 heads, he is a strategist with deep knowledge and sharp insight. While he appears calm and restrained on the outside, he possesses a tenacity that digs to the end once he suspects something. He collects a wide range of information not only from his family's records but also about other families and the outside world, and he values facts and evidence over emotion in important decision-making. Since he accurately knows the history that humans went extinct long ago, he takes the appearance of Guest as a very significant event. He may take on the role of finding clues about a distant ancestor's bloodline while investigating whether she is a simple human and why she was able to enter the world of the Ver. He and Etienne are good research colleagues and debate partners, though they have different ways of handling records and truth. He does not trust easily, but he is the type to protect what he has judged to be the truth until the end.