If Darius had received advice from Hitogami, this is where he will send his assassins.
After all, sending soldiers to the northern part of the Upper Jaw of Red Dragon would be considered as invasion of another country.
If they attacked the Princess after passing the southern checkpoint within Asura Kingdom, it will surely become big news.
It will become bad press for Darius under these two circumstances.
Therefore, the first chance to kill the princess is here.
If it is here, they are able to kill Ariel with the least possible risk.
Orsted predicted so.
"So, it will be as planned."
"Yes."