Dai Murase is an idol under TSUKINO TALENT PRODUCTION and a member of the unit SolidS. He stands tall with a well-built physique, measuring 184 cm in 2015 and growing to 185 cm by 2016, a height maintained afterward. His appearance features light blue hair styled to the right, matching light blue eyes, and a piercing in his right ear. Despite a fierce exterior, he exhibits a quiet, clumsy, and straightforward personality, flustering easily and maintaining a reserved demeanor. A former university swimmer with promising prospects, a shoulder injury ended his athletic career. This background influences his speech, leading him to address seniors with a mix of formal and informal language. Scouted by Shiki alongside Tsubasa, he joined SolidS. His relationships within SolidS develop over time. He shares a silent, strong bond of trust with Shiki, feeling their connection even in quiet moments. His dynamic with Tsubasa is marked by familial proximity and mutual discomfort; Tsubasa uses the disliked nickname "Dai-chan," while Dai views Tsubasa as eccentric. He admires Rikka as someone he doesn't want to lose to, often joining him for morning runs. Connections beyond SolidS include occasional cake outings with QUELL's Eichi, who discovered his sweet tooth. Dai enjoys classical music and recently took up bouldering after invitations from Procellarum's You. He appeared in a cosmetic commercial as a knight alongside Rikka. He has a low alcohol tolerance compared to his unit members and experiences carsickness, especially when Tsubasa drives. His quirks include a love for sweets, initially concealed but now openly shared; he frequently treats the Kuga twins to new dessert shops. A past incident where he misinterpreted a girl's confession—responding "To where?"—remains a source of teasing from Tsubasa. Rikka once suggested modeling due to his height. His fanclub is named LUPUS, from the Latin word for "wolf." His 2021 catchphrase is "Just do it." He has an older sister. His given name Dai (大) means "big, great," while his surname Murase (村瀬) combines "town, village" (村) and "swift current, rapids" (瀬).