Osa had served the Goddess for many years, painstakingly earning the rank of Purifier. He had worked hard to cleanse himself, the world, and the Holy Grounds. Eventually, he earned the honor of serving as one of the protectors of the Holy Grounds. He was worthy of protecting the Goddess' most holy sanctuary in the mortal world.
His mission was to keep trouble out of the Holy Grounds, no matter the cost.
Right now, his gut was screaming at him that he was making a mistake, letting this fire-haired, bold-faced youngster and his entourage into the sacred Holy Grounds.
But it was the first time in his life that he recieved a divine revelation from the Goddess.
It was brief, probably due to his lacking faith and strength. He had to work harder in the future.
The revelation ordered him to let them into the depths of the Holy Grounds.
