**Miyuki Sakaigawa** drums for GYROAXIA, a college band originating in Sapporo, Hokkaido, which relocated to Tokyo's Nishishinjuku area for the LIVE ROYALE FESTIVAL. A third-year dentistry student, he is among the group's older members. Standing 1.83 meters tall and weighing 76 kilograms, he has yellow or blonde hair and grey eyes. His birthday is February 26.

Previously a kickboxer, he switched to drumming seeking greater popularity. He leverages his natural physical strength to deliver flashy, impactful rhythms designed to leave a strong impression. Despite his appearance, Miyuki maintains a stoic demeanor. He exhibits a friendly and approachable attitude towards children and women. However, he harbors significant hostility towards fellow bandmate Kenta Satozuka, rooted in strong disagreements over Kenta's management style and policies for GYROAXIA. While he admires vocalist Nayuta Asahi, he firmly opposes Kenta's approach of sacrificing personal humanity for Nayuta's benefit.

GYROAXIA shares a Tokyo living space that includes their pet cat, Nyankotarou, whom Nayuta found and brought from Sapporo.