Initially under development in Ashford Academy by Nina Einstein, it was Nina's personal research on the possibility of using Uranium-235 as viable source of fuel. Lloyd Asplund later took an interest and provided her with sakuradite to further her research. Following Princess Euphemia's death, she created a makeshift nuclear reactor fortified with sakuradite, intending to detonate it and take out all of Tokyo in a misguided attempt to kill Zero and avenge Euphemia. However, it failed to explode.