The changes produced by Tao Qingqing were discovered by Wen Wen on the third day of feeding her his own blood.
Wen Wen could probably guess the reason she turned out this way; the blood he fed her was concocted for making his intentions align with the longsword's.
As Tao Qingqing ingested it all, the absorption far exceeded that of the longsword, therefore she obeyed Wen Wen even faster than the longsword did.
Moreover, the blood contained the power of Dark Matter and Frenzy. After Tao Qingqing took in the blood, she also absorbed these powers, which prompted her constitution to undergo bizarre transformations in just a few short days, making her quite different from traditional vampires.
Wen Wen conducted some tests; her five senses had become sharper, her strength and speed had increased, and her recovery ability was rising dramatically.
