Saionji Nanase

Biodata

Feature	Information
Name	Saionji Nanase (西园寺七濑) 16 17
Alias(es)	“Treasure Girl” 167 479
Gender	Female 18
Affiliation	Private Moonlight Academy; Class 1-A; Collection Club 87 204
Occupation/Role	First-year student; Collection Club founder and de facto leader 87
Family	Daughter of Saionji Koji and Saionji Rikka 478
First Appearance	Chapter 16 16

Background

Nanase was Natsume Chikage's middle-school classmate. He initially failed to recognize her after their reunion because she had become much prettier than he remembered. 16

She comes from the wealthy Saionji family, whose residence is a large villa in Tokyo's Minato Ward. Her father, Saionji Koji, is a major figure in Japan's collecting and auction world and owns Japan's largest auction house. Nanase developed her passion for unusual objects through her family environment. 18 478 485

She entered Private Moonlight Academy as the top-ranked student on its entrance examinations. Later, she and Chikage tied for first place in the school rankings. 36 473 479

Nanase and Chikage were born one day apart. During the Natsume siblings' visit to the Saionji villa, she proposed celebrating their birthdays together. 478

Appearance

Nanase is a petite girl of around 160 centimeters with a cute, refined appearance that combines an innocent air with the elegance of an affluent upbringing. 40

• Smooth, shoulder-length hair, with a lock on the left braided and tied by a pink ribbon. 40
• Large, bright violet or amethyst-like eyes. 191 466
• Fair cheeks and a naturally sweet smile. 18 40
• Often wears colorful prizes and accessories collected from school club games despite her otherwise elegant appearance. 40
• Wore a goose-yellow dress, off-white cardigan, Mary Jane shoes, and a rattan bag for her first outing alone with Chikage. 191

Personality

Nanase is naturally friendly, sincere, and approachable. Unlike Yukimura Suzune's distant demeanor, she responds earnestly to anyone who speaks with her and quickly earns goodwill from classmates. 17

Her defining trait is curiosity. She enthusiastically pursues unusual stones, antiques, mysteries, games, and new experiences, often treating each as something worth examining rather than dismissing. 18 204 244

Although she can be innocent and somewhat airheaded, Nanase has sharp interpersonal intuition. She notices subtle changes in Suzune's mood and recognizes tension between Suzune and Chikage even when neither explains it. 67 167 241

Nanase becomes shy when her feelings for Chikage are involved. She avoids naming the person she likes, but later recognizes him as her first love. 518 577 618

Abilities & Skills

Collecting and Bartering

Nanase has broad experience with collectibles, especially minerals, stones, antiques, and unusual trinkets.

• Collects objects based on personal interest rather than monetary value. 18
• Happily exchanges items with friends, including trading an Easter wood carving with Suzune and several stones with Chikage. 167
• Her personal collection contains multiple pieces of special equipment, earning her the description of a “Treasure Girl.” 167 479
• Her enthusiasm for sharing her collection helps Chikage acquire the Amber Bastion Stone through an ordinary stone exchange. 167

Collection Club Leadership

Nanase is the driving organizer behind the Collection Club.

• Prepared the club's operational plan, activities, and goals before meeting faculty advisor Sakai Shion. 87
• Answered Sakai's questions clearly and methodically, helping secure the club's approval. 87
• Proposed researching the century-old cherry tree on campus as the club's first project. 87
• Secured approval for the club's budget application and coordinated plans for its use. 161

Research and Investigation

Nanase participates in the group's investigations into the Seven Mysteries of Private Moonlight Academy.

• Helped investigate the “Invisible Evil Spirit” incident at the swimming pool and used a camera to record Chikage's recreation of the phenomenon. 132
• Assists with gathering, reading, and organizing case materials for the club's mystery articles. 353 542
• Provided Chikage with a concise, organized overview of the abandoned stairwell case when its accumulated records proved extensive. 353
• Joined the group invited by the Student Council to investigate paranormal incidents at an inn in Osaka. 490 526

Handicrafts and Art Guidance

Nanase can turn collected mineral materials into accessories and has enough drawing knowledge to teach basic technique.

• Designed the Moonlight Bracelet A using minerals from her collection and had a mineral-shop owner process the materials. 221
• Taught Chikage basic pencil control through direct hand-over-hand guidance and a “loose, steady, light” grip. 252
• Helped develop a manga project with Chikage, Suzune, and Aoi. 609

Equipment / Weapons / Items

• Amber Bastion Stone — A special-equipment amber rough stone formerly in Nanase's collection. She exchanged it to Chikage, who registered it and gained its defensive ability. 167
• Moonlight Bracelet A — A blue-quality bracelet designed from Nanase's collected minerals; it grants its wearer Mood +1. 221
• Unidentified special equipment — Chikage discovers seven special pieces of equipment in Nanase's room during his visit to the Saionji residence. 479
• Camera — Used to record the recreation of the swimming-pool Seven Mystery. 132
• Stone collection — Includes numerous unusual stones, several of which are valuable enough to be exchanged through the Collection Club. 167

Relationships

• Natsume Chikage — Former middle-school classmate, Collection Club companion, and Nanase's first love. She frequently supports his projects, celebrates his victories, and becomes embarrassed around him; an accidental kiss later leaves both of them flustered. 16 167 577 611 630
• Yukimura Suzune — Nanase's best friend and fellow Collection Club member. Nanase is unusually perceptive about Suzune's changing moods, while Suzune sometimes becomes jealous of Nanase's closeness with Chikage. 17 156 241
• Fujiwara Aoi — Close friend and Collection Club member. The two share enthusiasm for improving the clubroom and regularly celebrate Chikage's achievements together. 89 394 431
• Saionji Koji — Her father, a prominent collector and auction-industry figure. He supports Chikage's effort to buy back his former home and can help connect him with trophy-related contacts. 18 465 479
• Saionji Rikka — Her mother, who warmly receives the Natsume siblings and supports Nanase's feelings for Chikage. 478 479
• Natsume Ruri — Chikage's younger sister and Nanase's friend. Ruri initially considers Nanase the least threatening girl around Chikage because of Nanase's straightforward curiosity. 223 370

Story Role / Major Arcs

Formation of the Collection Club

Nanase brings Chikage, Suzune, and Aoi together around their shared interest in collecting. She leads the effort to establish the Collection Club, obtains Sakai Shion as its faculty advisor, and works toward meeting the club's one-month results requirement. 87

After the club receives its own room, Nanase immediately considers how to make it more functional and comfortable, suggesting equipment such as a refrigerator and heater. 89

Seven Mysteries Investigations

Nanase joins Chikage, Suzune, and Aoi in investigating the school's Seven Mysteries. She is initially excited by the supernatural premise but becomes frightened during the swimming-pool case, where she clings to Chikage for reassurance after witnessing the apparent ghostly shadow. 132 204

She continues assisting with research and documentation as the group investigates further cases, including the abandoned stairwell and the “Death Videotape.” 353 542

Stone Exchanges and the “Treasure Girl”

Nanase's passion for stones becomes central when she trades collectibles with Chikage. One of the exchanged stones proves to be the Amber Bastion Stone, revealing that her collection may contain far more than ordinary curiosities. 167

Chikage later visits the Saionji villa and finds seven pieces of special equipment in Nanase's room, confirming the extraordinary value hidden within her collection. 479

Growing Feelings for Chikage

Nanase's feelings emerge gradually through her handmade bracelet, her concern over Chikage's relationships with other girls, and her eagerness to spend time alone with him. 191 221 518

After accidentally kissing Chikage while retrieving her keys at his apartment, she later seeks him out to apologize. Their conversation makes clear that she believes it was likely his first kiss and deeply cares about how he feels. 611 630

Trivia

• Nanase's favorite hobby includes collecting strangely shaped stones, antiques, and novel trinkets. 18
• She ranked first on Moonlight Academy's entrance examinations and later tied Chikage for first place in the school. 36 473
• Her family has a private driver. 155 191
• In a board-game session, she excitedly declared that Chikage was her husband after her game piece landed on the same special space as his. 193
• She volunteered to be the first reader of Suzune's future work. 72