I guess. This just brings me back to the "it's all very vague" issue I had talked about before. Owldin isn't just looking for the monster but for whatever was making the noise, like an actual victim. If there isn't one Sonia would've known and she could have told everyone before Lotte went in. If the monster is dangerous than Sonia would also know that if it attacks Owldin or charges. 

Like I said, I get that having the power to see into the future is annoying since no one wants to actually tell me what's going to happen before it happens. It's just hard to figure out what to do next since it seems like my Portents basically means I can see exactly what's about to happen.