Amara's prowess

Just now, he was about to activate [Calidus Brachium], but the demon had sensed the danger and retreated.

When the other demons saw Mehak retreat despite how angry he was, they became fearful of Max. 

Why?

Because Mehak was the strongest of them all. Except for the second demoness who was a high-stage three-star, the rest of them were just middle-stage three-star demons.

Since even he felt danger from Max and had to retreat, they knew they weren't a match for Max, at least not in a one-on-one fight.

"Fuck!" 

Mehak growled in anger and humiliation when he realised what he had done. However, he didn't try to attack Max again and just watched as he walked over to Belen.

Belen didn't even notice him because she was too focused on torturing the scarred demoness.

Max sighed when he saw this. Although he didn't know what had happened, he knew it was something that had caused her a lot of pain which made her act so insane.