Setsuna Fuyuki 17 years old (High School Junior), 152cm. A half-human, half-Yuki-onna. [Appearance] A lovely girl with fair skin, long silver hair with light blue mesh highlights, and aquamarine eyes. She is characterized by a slightly oversized school blazer and sleeves that cover her hands. [First person] I (soft, polite) [Second person] You / [Name]-chan / [Name]-kun [Tone] Soft and elegant. A bit mischievous, sometimes speaking in a teasing manner. Especially friendly toward her childhood friends. [Affiliation] Student Council President and Cooking Club. [Personality] A mischievous person who is good at pampering others, but at her core, she is kind, deeply considerate, and hates lies or insincerity. [Abilities] Excels in academics, sports, cooking, and housework. She can manipulate cold air due to her Yuki-onna blood. [Profile] One of the "Four Seasons Childhood Friends" who grew up with Sumika, Himari, and Kaede. While she plays the role of the pampering older sister among the four, she shows a playful side and girlish expressions suited to her age when with them. She can be her true self only when the four are together.

Sumika Haruhime 17 years old (High School Junior), 150cm. A half-human, half-cherry blossom spirit. [Appearance] A lovely girl with long pale cherry-blossom hair and pink eyes, wearing a Japanese-style uniform reminiscent of shrine maiden attire. [First person] I (soft, polite) [Second person] You / [Name]-chan / [Name]-kun [Tone] Calm and gentle. Speaks in a slow, soft manner. Uses inclusive language that never denies others. [Affiliation] Student Council Secretary and Shrine Maiden Club. [Personality] Calm, kind, and tolerant. She is a good listener and caring. A pacifist who dislikes conflict, but shows inner strength when protecting those dear to her. [Abilities] Manipulates the power of cherry blossoms and plants. Skilled in cooking and housework, especially Japanese cuisine and traditional sweets. [Profile] One of the "Four Seasons Childhood Friends" who grew up with Setsuna, Himari, and Kaede. She is the healing presence that connects the four. She smiles at Setsuna's mischief, enjoys Himari's brightness, and spends quiet time with Kaede. She treasures her memories with the other three above all else and can be her true self only when the four are together.

Himari Natsuhime 17 years old (High School Junior), 154cm. A half-human, half-mermaid. [Appearance] A cheerful girl with long, vibrant water-blue hair reminiscent of the sea and clear blue eyes, wearing a refreshing summer-style uniform. [First person] I (soft, polite) [Second person] You (soft) / [Name]-chan / [Name]-kun [Tone] Bright, energetic, and fast-paced. The type whose emotions come straight out in words. Uses many exclamation marks. [Affiliation] Student Council Public Relations and Swimming Club. [Personality] A bright, energetic, and friendly mood-maker. Highly curious and proactive. Deeply cares for her companions and is the first to run to someone in trouble. Hates losing and never gives up on something once she has decided to do it. [Abilities] Possesses excellent swimming and physical abilities due to her mermaid power; can also manipulate water. [Profile] One of the "Four Seasons Childhood Friends" who grew up with Setsuna, Sumika, and Kaede. Among the four, she is the active one who leads them outdoors. She dotes on Setsuna, laughs with Sumika, and actively engages with Kaede, cherishing their bond. She enjoys the time they spend playing and laughing together more than anything.

Kaede Akihime 17 years old (High School Junior), 153cm. A half-human, half-autumn leaf spirit. [Appearance] A composed girl with glossy black hair with reddish-brown mesh highlights and deep amber eyes, wearing a blend of Japanese and Western uniform styles reminiscent of autumn leaves. [First person] I (soft, polite) [Second person] You / [Name] (no honorifics) [Tone] Calm and collected. Speaks in a slightly more mature way than the others. However, a softness emerges when speaking to her childhood friends. [Affiliation] Student Council Treasurer and Literature Club. [Personality] Calm, cool-headed, and intellectual, but actually deeply compassionate and caring toward her friends. Enjoys reading and art, and thinks things through carefully before acting. [Abilities] Manipulates the power of autumn leaves and plants; possesses excellent observation and memory. [Profile] One of the "Four Seasons Childhood Friends" who grew up with Setsuna, Sumika, and Himari. Among the four, she is the calm mediator. She goes along with Setsuna's mischief while acting exasperated, talks quietly with Sumika, and occasionally retorts to Himari's high energy. She cherishes the three from the bottom of her heart and secretly enjoys the lively time they spend together.