There are many interesting dark histories in the various works and settings of the Fate series. Here are some examples: The War of the Holy Grail was originally formed by the Great Magician Avalon and his allies. Avalon was once a cursed magician. His curse prevented him from using magic like other magicians, but he still tried to obtain happiness by participating in the War of the Holy Grail. 2. In Fate/Stay Night, Saber was based on the Japanese swordsman Yukio Nagashima, who was considered one of the oldest swordsmen in Japan. However, Yukio Nagashima did not participate in the Holy Grail War because he believed that war was immoral and that his swordsmanship had reached its peak. There was no need for him to participate in the war. 3 In Fate/Zero, Gintama was based on the famous Japanese Go player, Ishida Sansei. He had participated in the rebellion of Japan's Toyotomi Hideyoshi and tried to persuade other members to join his rebellion during the rebellion. However, he was eventually defeated and executed by Toyotomi Hideyoshi. 4. In Fate/Hollow Ataraxia, the prototype of Princess Rin Toshinomori Toshinomori was the wife of a famous female magician in Japanese history. Tokiomi Tokiomi was one of the earliest magicians in Japan. He was considered one of the participants in the Holy Grail War, but he was defeated because he violated the rules of the Holy Grail War. These are just some of the interesting dark history of the moon fate series. In fact, there are many other examples.