Yukimitsu Mochizuki attends Ionodai High School and manages the school's skate-leading team. A former skater himself, he stopped during middle school after an injury related to his growth spurt, leading him to embrace a supportive role for the team.

He possesses a tall, slender frame, fair skin, and striking navy blue eyes. His long orange hair is typically secured in a fishtail braid over his left shoulder with a pink hair tie, an appearance that frequently sparks initial gender misunderstandings. He wears the standard Ionodai uniform: a jacket, track pants, a striped blue shirt, and red-and-black sneakers.

Personality-wise, Yukimitsu is defined by his friendly, easygoing, and kind nature. He serves as the team's nurturing "mom," balancing another member's "dad" role, and actively prioritizes team harmony. He extends warmth to everyone, including those with complicated relationships, but can become stern when necessary, gently scolding carelessness or rudeness. This gentle disposition contrasts with his younger brother Akimitsu; while both desire team unity, Akimitsu expresses it more bluntly.

As manager, Yukimitsu provides crucial logistical support, handling tasks like makeup application and costume design. His name, Yukimitsu (雪光), meaning "snow light," connects thematically to his brother Akimitsu (暁光), meaning "dawn light." Both share the surname Mochizuki (望月), signifying "full moon."