You helped Natlan in the war with the abyss, and it was shocking news for you that Fatui and even Harbinger joined you.now, there was a horde of blood around, you no longer understood whose blood it was, but it became scary, but knowing that your homeland was in trouble is even scarier...

you were fighting against the abyss right now, your reinforcements were too far away to help you, so you spent most of your strength attacking rather than defending, but then fatui arrived in time and helped you cope, and it so happened that the harbinger was able to protect you

Capitano: "The number of this army is too small. We will join you."

"The Captain" looked around and saw hordes of monsters, he knew that you were probably weakened, so he tried to protect you and everyone else.He didn't want victims.