After Minos and Gloria's refusal, weeks passed, and soon the more powerful factions of the Church learned about their rejection.
That was not definitive about the positioning of the Black Plain and Gloria's group. But it was something that showed the powers of the Church that Minos and his wife would not simply bow down to the factions coming from the Evergreen Empire just because of their magnificent positions and wealth.
It wasn't enough that their group had Demigods, while the Black Plain group had only Spiritual Saints. It wasn't enough that their side offered opportunities for Minos and Gloria's freedom. They had to do something more if they wanted to have the loyalty of those two.
On the other hand, as promising as he was, one of the most talented princes with the potential to become a Spiritual Demigod under a thousand years old, something impressive, Calvert might not be enough for Minos and Gloria.