Historically she was known as the lover of Xiang Yu. In Type-Moon lore she is an immortal elemental, a type of spirit similar to the True Ancestors like Arcueid Brunestud. Since she's been ostracized by humans for millennia for being a vampire, she greatly hates mankind. She also deeply despises Koyanskaya because she witnessed Daji, another incarnation of the Great Fox, bring down an empire.
As her unascended form indicates, she is the true identity of Akuta Hinako.
