Shinaya Osaragi is a skilled and stoic assassin in the manga and anime series 'Sakamoto Days.' She is a member of the Order, an elite group of assassins, and is known for her calm demeanor and exceptional combat abilities. Osaragi is often seen alongside fellow Order member Shin, serving as his partner and complementing his abilities with her own strength and resolve. Despite her serious exterior, she has a unique sense of loyalty and demonstrates moments of kindness, making her a memorable supporting character.