What decision should they take?
Should they stay back and wait for the news, there is a high chance Sebastian's words might turn out to be true, and they will lose everything before Valerie gets forced to take charge on the battlefield.
However, if that happens, then humanity would lose several of its important warriors, and that would further damage their defenses when the Demon Lord would arise.
Austin knows that he would get stronger but it would be impossible to limit Astaroth within the other realm. So this domain still needs their eight S-rank warriors who could protect the general masses when it would matter the most.
So what could be the way?
"She has to go there." Selner gave the answer—direct and concrete.
"Why do you say so?" Austin asked, his demeanor clearly signifying that he was reluctant.