When the storm came, mortals scattered in panic at the roar of thunder—yet the thunder itself paid no heed to mortal reactions; its roar merely arose from its very existence, just as the existence of Homeloss was enough to interfere with the order of the Endless Sea.
Under this premise, considering whether "Captain Duncan" cared about being deemed a heretic by the mortal church seemed meaningless, overestimating the influence of worldly beings on the Subspace Shadow—besides, from another perspective, the image of Homeloss in the eyes of the civilized world was not much better than that of a "heretic"...
"I will discuss this matter with Helena, Banster, and Frem, the three pontiffs," Rune told Morris, "there will certainly be voices of doubt and panic among the bishops, but our attitude should soon be unified—regardless of the source of the news, at least the 'warning' itself needs to be taken seriously."