Luckily, we can request Perugius-sama to prepare a magic teleportation circle for us, so our travel time might not be long, and we might have time to spare. But with my father ill, if I don't hurry back we might miss our timing. By the time I arrive, my brothers might have already solidified their position."
Sounds like the king will die from this illness.
Then, the successor will be christened.
If we drag our feet, Ariel might not get a chance to join the fight.