Futaba Isurugi, student number 2 in the Actor Training Department of Seisho Music Academy's 99th graduating class, possesses amethyst eyes and amaranth hair styled in a pixie cut with bangs parted to expose her forehead, marking her as the shortest in her class. Her attire includes a standard school uniform: gray blazer with dark-gray trimming, gray knife-pleated skirt, white button-up shirt, red ribbon tie, brown loafers, and black crew socks. Casual wear features an oversized caramel hoodie with bell sleeves and tan boots, while dorm wear consists of a rich-green sweatshirt with a Daruma doll patch, a black T-shirt, and dark-purple shorts. Practice attire is a black leotard with grey leggings and a white crop top. Her revue outfit comprises a purple jacket with golden piping, standing collar, white turnbacks, and red cuff flaps, golden armband and epaulettes over a white button-up shirt, a pale purple knife-pleated skirt with a purple ribbon at the back, black boots with golden trim, and a red pelisse jacket over one shoulder. Her weapon is a shortened German-style halberd featuring an amethyst gem at its base. A graduate of Keian Private Women's College Junior High Division, Futaba studied traditional Japanese dance in the Senka-ryu school since 2005 and gymnastics at the S·A·C Shimogamo Action Club Gymnastics Workshop since 2010. She performed at the 2014 Traditional Dance Federation of Japan's Cherry Blossom Viewing Festival and placed third in the National School Council's New Year Dance Performance in both 2015 and 2016. Futaba and Kaoruko Hanayagi share a lifelong connection from Kyoto, where Futaba supported Kaoruko's traditional dance training. Futaba handles tasks Kaoruko avoids, including manual labor and driving her to school via motorcycle. This reliance created tension when Kaoruko became overly dependent, prompting Futaba to seek growth elsewhere. She trained with Claudine Saijo to refine her dance skills after initial defeats, significantly improving her abilities. Frustration grew as Kaoruko stagnated and failed early auditions, culminating in Kaoruko's temporary decision to leave the academy. Futaba pursued her to the train station, leading to a revue duel where Kaoruko emerged victorious. This confrontation resolved their conflict, with Kaoruko acknowledging her need to improve and Futaba reaffirming their bond while pursuing individual paths. In revues, Futaba demonstrates athleticism and proficiency in staged swordfights. Her introductory declarations vary: * Anime: "There is a path we two have walked, one that goes between song and dance... Yet I have found a straight path, one that rises to the night sky! 99th Class, Futaba Isurugi! I will dash forth with fighting spirit!" * Game Re LIVE: "I found it that day. A two-man performance on a stage where flowers dance. From here on, no one else may enter. A direct path with no holding back! 99th Class — Futaba Isurugi! I will dash forth with fighting spirit!" * Film: "At the beck and call of my childhood friend, I've sung and danced for ten and eight years. The butterfly's selfishness, and the flower's nonsense... Apologies for the inconvenience they've surely caused you all. Our rotten relationship slathered in candy— I'm betting on laying it to rest. Now for the match! 99th Class, Futaba Isurugi! This is a straight path of parting! Alright, which one, which one?" Futaba overcame her initial last-place ranking in the academy entrance exams through persistent training. She eventually decided to join the New National First Theater Troupe, entrusting her motorcycle to Kaoruko as she forged an independent path. Her revue outfit and weapon incorporate both her and Kaoruko's image colors in their gems. Futaba dislikes idleness and fish, preferring meat, cheap candy, and snacks like kinako sticks. Her perseverance aligns with the proverb "Three years on a stone." The kanji in her name "Futaba" (双葉) mean "two leaves," contrasting with Kaoruko's "flower" meaning. Her surname "Isurugi" combines "stone" (石) and "movement" (動), often misread as "Ishido," inspired by a mame daifuku seller near Kyoto's Kamo River and referencing a childhood scene with Kaoruko. Futaba participated in revues including the Revue of Despair, Revue of Heat Haze, Revue of Rainbow, and Revue of Canis Major across various media. Her interactions extend beyond Kaoruko to include Claudine Saijo, who mentors her dance skills, and Karen Aijo, whose determination indirectly motivates her improvement.