First, from the appearance, Kuroyuki hime has long hair similar to that of tomorrow nai and hair color similar to that of Tongren, and the pupil color is the same as that of tomorrow nai.
Secondly, Tonggu Ren and Yuuki Asuna were the first pair of early generations to enter the accelerated world. With the wisdom and technology of my colleagues (6-year-old personal computer assembled with waste products, second-knife users), it is possible to create an accelerated world, and Kuroyuki hime's purpose of betraying the King of Six Colors is most likely to enter level 10 to meet game makers. What may have happened in the middle.
Third, Kuroyuki hime once used the 16 combo mind skill (Starlight Stream combo), and Kawahara Reki may want to tell us something, because in the Sword God domain, the bronze man once used the highest skill of the 16 combo special skill "Starburst Air Chop", which may of course be given to him by the developer on purpose, so who developed this skill? Why develop this skill and give it to Kuroyuki hime?
So I think the developer of BB may be Tongren, and something happened between him and his daughter. Let his daughter take part in the BB he developed and level it to 10, so that he can meet himself and solve what happened.
Judging from 2032 (Kuroyuki hime was born), the age is also correct (Tongren was born in 2008 and Athina was born in 2007).