Emilia has the blessing of the Goddess of light due to which she can see the light that is emitted by a person. She is able to see the exact colours but for Rex, nothing was visible at least that's what she thought!
But never would have she imagined that the Rex's light was COLOURLESS!
That was why she was completely surprised when she saw Rex.
"W-who is he...?"
The colour black represent evil or bad and white represented good and pure. The same went for other colours where red represents anger or dominator, blue represent calm and gentle, green represent sweet and humble, yellow represent agitated or Unhappy and finally pink represented beauty! Beside these there were other colours too.
But Rex didn't have any of those colours.
"No colour? Or does it mean Colourless? Is that even possible?"
She was mumbling to herself all these but the butler who was beside her was looking at Bandis continuously.