Yoshino Takuboku is the daughter of Luca Calabrese and Hayami Takuboku. She was born in Milan, Italy, three years after her brother Asano, and lived in the Calabrese Manor during her childhood. Yoshino lived a very normal childhood and bonded quite closely with her brother. Yoshino's Strega abilities developed around the time that she was five, and she found that she could manipulate the element of aether when she was reading a book about the ocean and muttered "Waterspout." Afterwards, she trained with the help of Asano to hone her abilities. Her mother also helped her control her Mana, as she was also a Strega. A year passed, and their mother told them that she would teach them her family's ancient sword style. Although it was less known, it was very useful in a fight. That week, however, their mother died, having been stabbed to death by his father in so-called "self-defense." It was revealed that Asano and Yoshino's father absolutely despised the Genestella. Secretly, he had only wanted to marry her because of her power, and when she told him that she was going to pass down her techniques to her children, he snapped and killed her. Yoshino was standing in the room, and fell into a trance after witnessing her father kill her mother. Her powers went out of control, nearly destroying the house and knocking her father unconscious. Asano managed to get into the house, and calmed her down, which released her from the trance, but their mother was dead. Afterward, officials came to investigate the house, and their father regained consciousness, telling them that he killed her in self-defense. The siblings were shut in their rooms while everything was being sorted out by the officials. For the next year, the tension in the house was quite high, so Asano and Yoshino made secret paths out of the house, where they would train together using their memories of times they had seen their mother use her sword. The two of them possess eidetic memory, so they would train in secret when their father was asleep or away from home. They improved on it, and although they believed the Takuboku style to be lost, they took what they knew and made a style of their own. They trained for about another year before a second tragedy struck the two siblings. Their father, who had been using Calabrese Incorporated as a shell company to hide R&D tests and illegal Genestella experiments, had finished an Orga Lux under the codename "Project Hourglass," and had forced Asano to wield it. In a trance, Asano went to his sister's room, releasing a shockwave from the Shattered Rose which knocked her into a comatose state. Five years passed, and Asano's father enrolled him into Seidoukan Academy. However, just a short while after he enrolled, Yoshino woke up.