Reili
Nanobots can make just about anything right? Technically Mini-Shiro could be the result of a genetic recombination of her DNA and any of her love interests. (If not just a literal Shiro 2.0 clone.) The methods to recombinate DNA I have no clue, but nanobots can probably do some interesting genetic modifications when Shiro inevitably becomes the Goddess of Deus Ex Machina (literally god in the machine).