Honkai Impact 3rd: A Moonlit Promise

Kamen Rider Kiva, with Yuexia as the sole heroine. Since there are so few Kiva fanfics, and even fewer that go off the rails with Yuexia as the sole heroine, I've already made peace with this one being a flop. Some characters may also be out of character because of this premise, so please bear with me. Also, if anything differs from the original setting, it's because I couldn't find the information, so just consider it an alternate interpretation.