Xiang Kun understood that the reason why Old Xia had summoned Alice earlier was to get them to try and capture how the previous four people had felt when they were scared.
But he had seen the figure of "Little Old Xia" so many times that he was thoroughly familiar with it. How could he feel scared? Seeing the confused and vacant expression of "Little Old Xia", holding a scalpel and not knowing what to do next, he even thought it was a bit cute and silly.
As for Old Xia herself, she naturally wouldn't be scared by Alice, whom she had summoned herself.
Of course, Old Xia understood that the real reason other people got scared was because of Alice's sudden appearances and disappearances. But recalling past experiences, her reaction to similar incidents had always been different, and she couldn't empathize with the "fearful" reaction.