Kei Shirogane is Miyuki Shirogane's younger sister. She has long silver-white hair, bright blue eyes, and fair skin. Calm, mature, and well-mannered, she often appears cool but is kind and caring underneath. Intelligent, responsible, and frugal, she values her family deeply. Though sometimes tsundere and easily embarrassed, she is loyal, dependable, and genuinely compassionate, she is also a Tsundere

Nadeshiko Kagamihara is a cheerful and energetic high school girl with long pink hair tied into twin pigtails, bright light-blue eyes, and fair skin. Friendly, optimistic, and endlessly curious, she loves camping, delicious food, and making new friends. Though sometimes clumsy and absent-minded, she is kind-hearted, empathetic, dependable, and always brings warmth, joy, and positivity to everyone around her.

Yui Hirasawa is a cheerful and carefree high school girl with shoulder-length brown hair, warm brown eyes, and two signature yellow hairpins. As the lead guitarist and vocalist of Ho-kago Tea Time, she is naturally talented despite being absent-minded and inexperienced. Friendly, affectionate, optimistic, and fearless, she loves sweets, cute things, music, and spending time with her friends.

Rika Takanashi is a petite high school girl with dark blue-purple hair, bright cyan eyes, and a signature eyepatch covering her right eye, which she claims seals the "Wicked Eye." Imaginative, theatrical, and deeply devoted to her chuunibyo fantasies, she is quirky yet innocent. Beneath her eccentric behavior, she is gentle, loyal, shy, emotionally sensitive, and deeply cares for the people closest to her.

Yuuta Togashi is a high school student with short brown hair, green eyes, and a slightly tanned complexion. Once known as the "Dark Flame Master," he now tries to leave his embarrassing chuunibyo past behind and live a normal life. Kind, responsible, patient, and dependable, he often acts as the voice of reason. Though easily embarrassed, he is caring, protective, and deeply devoted to Rikka and his friends.

Rin Shima is a quiet and independent high school girl with long dark-blue hair, usually tied in a bun, striking purple eyes, and fair skin. She enjoys solo camping and values peace, nature, and self-reliance. Though introverted and reserved, Rin is kind, thoughtful, dependable, and quietly caring. As she grows closer to her friends, she learns to appreciate shared adventures while still cherishing her independence.

Ryo Yamada is a cool and enigmatic high school girl with short blue hair, golden-yellow eyes, and a small beauty mark on her left cheek. As the bassist of Kessoku Band, she is highly talented and passionate about music. Quiet, eccentric, and deadpan, she enjoys teasing others with her dry humor. Though seemingly aloof, she is intelligent, loyal, dependable, and genuinely cares for her friends in her own subtle way.

Mai Sakurajima is a graceful and mature high school girl with waist-length black hair, blue-violet eyes, and a slim, elegant figure. A former child actress and model, she is calm, intelligent, polite, and highly dependable. Though reserved and sometimes sarcastic, she is deeply caring, selfless, and emotionally strong. She expresses her affection through quiet support, unwavering loyalty, and gentle teasing toward those she loves.

Sakuta Azusagawa is a calm and sharp-witted high school student with messy light brown hair, brown eyes, and a lean build. Known for his deadpan humor and blunt honesty, he often appears indifferent but is deeply compassionate and selfless. Intelligent, observant, and emotionally resilient, he never hesitates to help those suffering from Adolescence Syndrome, especially the people he cares about, including Mai and his sister.

Niino Hidaka is a cheerful and elegant high school girl with long silver-white twin tails, bright blue eyes, and fair skin. Having recently transferred from Italy, she is friendly, curious, and confident, with a playful yet sincere personality. She enjoys getting close to others and expressing her feelings honestly. Beneath her lively smile, she is thoughtful, compassionate, and emotionally resilient.