The crown prince being like that is most likely system's interference as we always see cogs whenever he act unlike himself. He also said that he doesn't realize he did those.
Saintess probably is just running away due to the revelation that she got. Cuz she is being targeted by the princess' faction and the one supporting her. I suspect it's someone from the church.
I don't think CP is the same as the blonde dude from the tower. They both just happened to be blonde.
Back to the crown prince, the tower master has planted a bug (curse) on the system, so his actions was either due to the system or the bug that was planted.
If there was a plot twist, MAYBE the saintess planned her disappearance and faked her death etc etc but I will give her benefit of the doubt, someone else might be behind all this.
I've been wonder. this is all my question;
1. what if she died? what if she didn't do a task that the system has given her and then she died?
2.who's the one behind or controlling the system?
3. why is the constellation's afraid of the system? is it that powerful? (useless question)
4. is the blonde hair dude in the tower is the prince? they look so identical.
5. the prince is sus with his sudden obsession with the FL, what's up with him???!
6. the saintess is possessed or everything is just her play?
7. is the answer to the FL's question will all be answer when she meet the saintess or it will all be in the tower that she once go in her past life?
i can't sleep with all of this thoughts running in my mind so i'm going to drop it here hehe