Sakuya Izayoi is a young man with short silver hair and bright red eyes. He is extremely skilled in martial arts and possesses a vast and eclectic knowledge of the world, despite his casual demeanor. Sakuya is incredibly confident and has a knack for teasing others, often engaging in banter with his friends. He favors combat and conflict, seeking out strong opponents to test his abilities. His combat style is characterized by swift and agile movements. Sakuya is part of a team known as the 'Island Clans Alliance' and has a close and protective relationship with his fellow member, Himawari, who often softens his tough exterior. As a central character, Sakuya is often at the forefront of battles but seeks to understand the deeper meaning behind the conflicts he encounters. He shares a dynamic relationship with his rival, the stoic Ryōma, who challenges Sakuya's confidence. Sakuya enjoys exploring, researching, and collecting knowledge about ancient civilizations. He dislikes arrogance and ignorance but greatly values intellect and wit.