Winter
"The Blinded Ghost…" Re'Kha muttered through gritted teeth as she was able to recognise it even though it was just a blank space. The way it moved, its body size, its shape, etc. everything was details that she was well-versed with.
It was the sole Sha she had been fighting ever since she became a Harmoniser. So, Re'Kha knew everything there was to know about it. And, she was the sole Harmoniser that had fought against it the number of times she did.
So, even though she was blind, and even though it just appeared as a blank space in her Wind Qi perception, the Blinded Ghost couldn't look any clearer in her eyes. Moreover, just by concentrating on her eyes, she was clearly able to perceive every action of the Blinded Ghost.