[Spoilers] I'm getting sick of shonen manga power-ups each arc

[Jandor]

When the same source (the lore book) takes care to make it very obvious when we have someone with us (by saying that we are not alone and calling out the units of adventurers) then yes this is for me evidence that we are alone. Otherwise why would that example be different and not mention them even though they are there?

Brevity. There just isn't any real need to mention it explicitly every single time, it's enough to set the precedent.