After Fein talked about his capability to transform into a perfect organism, and satisfied Voli's series of inquiries. The group finally decided to fly to the mountain peak. Since Fein killed the four eagles that act as a guardian, their climb was smooth and they didn't encounter any monsters again.
The fight between the six golden grade guardians ended in such a short time. But the power of the guardians would undoubtedly give others trouble. Fein, Voli, and others were just entirely abnormal, as they could defeat one rank higher than their realm.
Sofia could defeat S ranks as long as she could hit them. However, she has a high chance of dying if the enemy she faced is of a speed type. Her offensive power is overwhelming because of her destruction energy, but her weak link was her defense speed.
Voli and Aoi, on the other hand, are mythical beasts. It was already in their blood to fight enemies above their realm.