They are redrawn panels, but they were taken from these chapters.
Chapter 21: Assistant Shrine Maiden -> The girl who sacrificed herself to a god in a well and avenged her friend.
Chapter 30: Detective's Assistant -> The girl who was hit by a car at the end.
Chapter 42: Family Restaurant...
It wasn't established that the four of them are the same person so they share the same talents and
physical attributes so the glasses are only for fashion?