Course of Fire
As it was dangerous to wait inside the volcano, I instructed the girls to fly outside and wait for me at the peak. They, however, insisted on staying inside, and I was forced to give them the 'stern' look. After that, they left obediently—though hesitantly—as they didn't want to make me repeat myself. When I had that 'stern' look on, nothing they said would change my mind, and I would knock them all out and drag them out if I had to. They knew that, and didn't want to risk it.
In any case, I was now alone in the deepest parts of the volcano, inside a chamber with a literal trial of fire inside. The obstacle course ahead seemed to be approximately 100 meters long, meaning it was pretty short. But… a mere 100 meters was still enough to make anyone sweat (both figuratively and literally—it was burning in here).