Commentary:
Now you know that the increased security was the main reasons I had Elah join them this chapter. It would be odd to just let a 13-year-old take two friends with him to the forest in the middle of the night. It made the most sense to me and it ended up working out pretty nicely.
You know also know that Olaf (and likely others) were aware of the powers that Auda's mom has and the fact that Otto knew that Auda had the same powers. The next few pages should prove to be interesting.
Relevant pages:
20-45, 20-48 ,21-1