The Mirror Demon didn't truly look like Jiang Qingyun; the appearance it presented was extremely similar to anyone who looked into the mirror.
The slight difference was deliberate by the Mirror Demon.
If the resemblance was perfect, how could it incite fear in someone?
It was that small, subtle difference that was truly frightening.
Previously, the Mirror Demon had attempted to use this to trick Jiang Qingyun into thinking she was a descendant of the Demon Clan with the Mirror Demon's bloodline, which was why they looked so similar.
Honestly, there had been a time when Jiang Qingyun almost fell for it.
But almost is almost, and failure is failure.
The fact was that Jiang Qingyun had successfully broken free from the Mirror Demon's control, and after she had outwitted it, the Mirror Demon harbored resentment and ordered its younger kin to trouble Jiang Qingyun, only to be ruthlessly killed instead.