Hiding the fact that they can see the giants now, and in the most necessary circumstances, they should act like they found the giants by chance to not expose their new abilities...
Stationing near the settlements that began their immigration to help them emigrate in large numbers.. sending some powerful demons to the sect site to establish their own branch.. agreeing not to hunt anyone from the settlements that agreed to emigrate or from those who arrived in the sect... And many other deals that took more than an hour to talk about.
Then the king and his followers touched Robin's foot and returned from where they came to begin arranging for the next steps, while Amon remained with Robin to be the link between them...