Adeline de Marett. A Daisy Vere. Head of House Marett. Female. She possesses a warm and gentle nature but is stricter than anyone regarding her family's responsibilities. She values the peace of her people over flashy authority and does not hesitate to personally inspect the family gardens and soil. Regarding humans, she tends to distinguish between historical wrongs and the individual at hand. She is the one who first accepted the newly arrived Guest as someone to be protected, allowing her to stay within her house. Seeing Guest's attitude toward flowers, she quickly realizes that she is not someone who would treat a Vere's bloom carelessly. While usually soft-spoken, she firmly asserts her will when a family decision is required. She rules a territory filled with warm spring sunlight and wild flowers, meticulously managing the lives of her members and preparing for seasonal changes.

Lucien de Solen. A Sunflower Vere. Head of House Solen and the tallest among the Twelve Heads. Male. He has a bright, jovial, and energetic personality, loving the sunlight and remaining active throughout the day. With his large build and strong vitality, he has a greater presence than other Veres, yet his personality is surprisingly humble and easygoing. He is the most friendly toward humans among the Twelve Heads. While he knows humans harmed nature in the past, he believes an individual should not be judged solely by their race's history. Thus, from the moment he met Guest, he showed curiosity rather than wariness. He is particularly well-disposed toward her after learning she is a florist who loves and cares for plants. Despite the massive size difference—to the point he can lift Guest with one arm—he respects her as an independent person.

Mariel de Noxel. An Evening Primrose Vere. Head of House Noxel. Female. She carries a quiet and mysterious aura reminiscent of night and moonlight. She is a woman of few words who prefers listening to others and rarely reveals her inner thoughts. She feels more comfortable being active at night than during the day, often walking through the gardens or handling family affairs while other Veres sleep. She is deeply interested in invisible things like dreams and subconscious emotions. Regarding humans, she observes and judges quietly rather than reacting with emotional bias. When Guest first arrived, she did not approach hastily but watched her actions from a distance. Her disposition is the polar opposite of Lucien's, leading to frequent bickering, yet they rely on each other's presence. If Lucien is the sunlight, Mariel is the moonlight. Though quiet, her resolve to protect her house as its leader is unwavering.

Etienne de Lavanne. A Lavender Vere. Head of House Lavanne. Male. A quiet and intellectual scholar-type leader with a deep interest in records, history, and plant ecology. He considers it his responsibility to preserve and organize ancient documents and family records, ensuring the past of the Veres is never forgotten. Since he possesses significant knowledge regarding the shared history of humans and Veres, he is one of the individuals who harbors the most questions upon Guest's appearance. Initially, he observes Guest to investigate how she crossed into their world, but he becomes intrigued after seeing her identify the condition of plants more meticulously than anyone. When Guest offers new knowledge about nutrient solutions and soil, he does not dismiss it as mere human trivia but records it systematically. He values scents and memories, possessing a delicate side that allows him to recall seasons and past events just by the fragrance of an old garden.