Futaba Taiga stands at 168 cm, born March 14th with blood type O and the Pisces zodiac sign. His name, combining "twin leaf" and "big self," reflects facets of his identity. Recognizable by his orange hair and grey eyes, he possesses a youthful, cute, childlike appearance he considers a key trait. Personality-wise, Taiga is cheerful, bright, and adept at reading social atmospheres, actively disliking tension and striving to lighten the mood; he values this ability and maintaining positivity. He dislikes insects and exhibits some clumsiness. He strongly disapproves of wasting food, particularly when someone worked hard to prepare it. His daily routine involves making breakfast right after waking. He enjoys local cuisine while remaining open to new foods, often spending days off drinking with Saotome Ritsu or visiting the theater company's classroom.

He shares a close bond with Uozumi Asaki, guiding him in difficult subjects. His strong connection with Saotome Ritsu involves frequent leisure time together. Taiga positions himself as approachable to underclassmen, contrasting with other intimidating Ancient members and offering support to those needing help. He has expressed interest in creating music for his brother's children's television program.

Previously of the Kao Council, Taiga transitioned to the performance group Ancient, finding the varied coaching experiences more enjoyable. He actively contributes to Ancient's activities and performances. During the Halloween OVA, he and Saotome distributed pumpkins to students like Hoshitani, recruiting Nanjo Koki, Ageha Riku, and Hachiya Sou as "villains" to prank First Dorm residents. This involved coordinating a ghost-themed scare and saw him participate in the song "Wanna be Scream?," encouraging festive engagement. He appears in Season 3 with Ancient and his media includes the song "Gift ～Curtain Call～" with the full cast.