Futaba Yozakura is the oldest child and second member of the 10th generation of the Yozakura family. At six years old, she took her first spy exam and passed it with flying colors. Despite being kind-hearted, she assisted other examinees in their traps, resulting in a record-breaking number of spies passing at thirteen. At eight years old, Futaba became the first member of her family to pass the silver rank spy exams. The tests were brutal and crude, so she defeated everyone to protect her siblings from any harm that might come their way during their own exams.