There's no card that's depicting what Yuju and Eunha symbolize, so I'll just assume Yuju is the reader and Eunha is the one being read.
I think, the images are representing the card each members chose when the have their tarot reading. Except for 97 line, but hey, it's just a preview and we don't know what's inside the photobook
The Chariot card is about triumph in worldly matters. A moment of greatness, but also a risk of megalomania. Success can destroy character quicker than adversity builds it.
Kinda connected https://twitter.com/shirei32/status/1278347576643706880?s=19
The image of the Temperance Tarot card is one of stillness. The simple explanation of Temperance is moderation, but there's nothing simple about it. Living modestly, with patience and contemplation, brings life into balance. That is what perseveres.
https://twitter.com/shirei32/status/1278348914567999488?s=19 Brings life into balance
The Tarot Magician seems to have everything in control, like a master of fate, but that might just as well be an illusion.
So it's about what's real and what's the illusions https://twitter.com/shirei32/status/1278349877705990144?s=19
The strength on the picture of the Tarot card seems delicate: A maiden pure at heart holds the jaws of a lion, making it harmless. That's real strength, far beyond what mere muscles can accomplish. It's so powerful because it has an ideal
https://twitter.com/shirei32/status/1278348412077797376?s=19 Some would say that the Tarot Strength card is not about strength at all, but the path away from it. Maybe so.
All my source are from https://www.tarotcardmeanings.net
I'll try to break it down further when we can get access to the complete photobook