Gaku is depicted in a dynamic, ready-for-action pose that mirrors his adolescent energy and growing proficiency from Sakamoto Days. He stands on a compact display base, one foot slightly forward, as if stepping into the next mission with his father's legacy behind him. The sculpt captures his characteristic spiky hair, animated facial expression, and the casual-but-functional outfit that fans recognize. Subtle shading highlights the folds of the jacket and the contrast of the shirt and pants, while the paintwork delivers crisp color blocks and crisp linework. The Vibration Stars treatment adds a glossy finish and a sense of motion to this compact collectible.

Gaku is the son of the legendary Sakamoto, a former assassin who now runs a neighborhood store and tries to keep his family safe from the old life he left behind. In the story, Gaku is curious, brave, and increasingly capable, often following his father's footsteps while discovering his own talents. He balances school life with glimpses of danger, learning to read people, assess risks, and work as part of a team. Through their adventures, Gaku embodies themes of loyalty, growth, and the possibility of choosing a peaceful path after a life of conflict, maintaining hope while the world around them remains unpredictable.