Dirty Pair
Although it is often said that these are younger versions of the original "Lovely Angels" Kei and Yuri, in truth this series is an alternate universe telling of "Dirty Pair", set in the years 2248–49. When Sunrise originally began the project, their idea was to make a sequel to the original "Dirty Pair" series, but Kyōko Tongū, the original voice actress for Kei, had long retired and moved to North America, and Saeko Shimazu, the voice of Yuri, refused to work with anyone but her original partner, forcing the project to be a remake of the original series instead.