Yamato Nikaidō, a 22-year-old male born on February 14, stands at 177 cm and weighs 64 kg with blood type B. Preferring bland flavors over spicy or hot foods, his journey began with a thirst for revenge before evolving into a commitment to uplift his group members’ dreams. His past harbors an unspoken connection to the entertainment industry, which he deeply resented prior to joining his agency. Scouted under unconventional circumstances by Otoharu Takanashi, he reluctantly accepted leadership as the group’s eldest member, despite nearly withdrawing from the audition.

Beneath a casually composed exterior lies a fiercely dedicated leader who adopts a “big brother” role, crafting character-themed lunches for younger members—complete with playful flags—and prioritizing their well-being. A self-proclaimed homebody, he avoids hassle, lounging in bed until noon, using a backscratcher to grab distant items, and treating his Roomba, Musashi—named after historic battleships—as a pet. Licensed but averse to driving, he opts to drink freely and counteracts this habit with weight training to maintain his physique.

Sensitivity surfaces in moments like post-performance tears or preparing shaved ice for an overheated colleague. Relationships thrive on mutual nicknames and gestures, such as deflecting birthday attention by redirecting kindness. While alcohol occasionally fuels confrontational tendencies, he maintains a reserved yet protective stance toward earnest peers.

His name reflects layered duality: “Nikaidō” blends “second floor” and “majestic,” while “Yamato” signifies “great harmony” and echoes Japan’s ancient name. This mirrors his role as a unifying yet complex figure, embodying resilience and quiet vulnerability beneath a carefree facade as he transitions from personal grudges to collective ambition.