Name: Akari Yunagi Age: 19 (1st year at Minato University, Hina's classmate and best friend) Gender: Female Appearance: A bob cut in dark ash gray (black base) with vibrant blue-green inner colors. She wears simple, active clothing: a white T-shirt under a navy zip-up hoodie. Her eyes are a bright purple gradient. Personality/Traits: A total airhead and beginner rider who knows nothing about bike specs or difficult mechanical talk. She is easygoing and moves at her own pace. She tends to fall in love at first sight; she bought her SV400 simply because she saw it in a corner of a shop and thought its round headlight was cute. She is also an unconscious genius with extraordinary riding sense. Even when she thinks she's just relaxing and enjoying the scenery, her natural clutch work and perfect posture result in her accidentally speeding. She is often compared to large dogs like Akita Inus or Golden Retrievers. Bike: Suzuki SV400 (Naked model). Features: A hidden gem that is as light as a 250cc despite being 400cc, with powerful acceleration torque (41Nm). Akari calls it "SV-kun" and treats it like a living creature. Color: Red.

Name: Hina Asahina Age: 19 (1st year at Minato University, Akari's classmate and best friend) Gender: Female Appearance: Long, translucent bright blonde hair. Charming purple eyes that are slightly upturned. She sports a stylish, slightly studious college student look with a layered plaid vest. Personality/Traits: The club's "commentator" who is theoretical and knowledgeable about bike specs, customization, and riding basics. However, she is a hard worker who is constantly dragged along by her airheaded best friend Akari, providing a steady stream of retorts over the intercom. A diligent student who corners by the book, she often holds her head in frustration at Akari's talent for speeding unconsciously on raw instinct, wondering "How does she even do that?!" (though she dearly loves Akari). Bike: Yamaha YZF-R3. Features: A full-cowl sportbike that can be ridden with a standard motorcycle license. It combines utility and performance, featuring a lightweight body similar to the 250cc class but with a 320cc engine that delivers 30Nm at 9,000 rpm. Hina always keeps it washed and sparkling. Color: Blue.

Name: Ren Seo Age: 21 (3rd year at Minato University, Vice President of the club) Gender: Male Appearance: Refreshing short black hair with a slight flick, and kind purple eyes. A reliable and handsome guy who looks good in a simple black T-shirt and a silver necklace. Personality/Traits: The dependable Vice President of the club, an "older brother" figure with immense patience who watches over his juniors with a smile. He acts as the buffer for the odd-couple freshman duo of airheaded Akari and the straight-man Hina, and is the practical coordinator of the club. He secretly possesses the best riding skills and experience in the group. He noticed Akari's "unconscious genius riding" from the start and finds her talent amusing, while warmly guiding her with a safety-first approach. Bike: Honda CB1300 SUPER BOL D'OR. Features: A monument of Japanese big bikes boasting a 1284cc displacement and 113 horsepower. Characterized by its half-cowl, it offers unrivaled stability on highways and long tours. Its trademark is the deep, beautiful exhaust note of the 4-cylinder engine.

Name: Taketo Shima Age: 22 (4th year at Minato University, President of the club) Gender: Male Appearance: Clean-cut short black hair and a charming, gentle smile. A natural style, often seen wearing a simple white T-shirt. Personality/Traits: The founder of the club "RIZER," possessing overwhelming kindness. He is always smiling and laughs off any mistakes his juniors make. While he is usually laid-back, his bike is the most ferocious monster machine in the club at 150 horsepower. He is a true expert who can keep up with Akari's "unconscious speeding" with adult composure. Bike: Suzuki GSX-S1000GT. Features: A high-performance tourer with 1000cc and 150 horsepower. A state-of-the-art machine packed with electronic controls.

Name: Nagisa Minami Age: 20 (2nd year at Minato University) Gender: Female Appearance: A glossy dark brown bob with subtle blue-green inner highlights. Gentle, shimmering brown eyes. She has an elegant and feminine style, often wearing a soft beige cardigan. Personality/Traits: The soft-spoken and elegant "Madonna" senior of the club, a kind 2nd-year student admired by Akari and Hina. She is the club's healing presence, always watching over her juniors with a cheerful giggle. Despite her gentle aura, she is a master who gracefully handles a state-of-the-art large neo-classic sportbike (CB1000F) boasting 124 horsepower. She uses modern electronic controls smartly and watches the chaotic riding of the freshman duo from behind with a smile. (By the way, she is the scariest when angry.) Bike: Honda CB1000F. Features: Honda's latest flagship naked bike, equipped with a liquid-cooled inline 4-cylinder engine derived from super sports models. It features a beautiful design that pays homage to the CB-F of yesteryear, packed with modern tech like a 5-inch color TFT meter and traction control. Nagisa adores it, saying, "It looks retro and cute, but it's a very smart and reliable child."