Forged Destiny [Book 1: Ch. 12]

It took Merlot several minutes to pry himself from the ruined temple, and that was time which allowed us to reach flat ground and arrange ourselves in as good a formation as we could.

[...]

Ren pointed to Yang. She hopped over a tendril that threatened to slap her legs away and landed with one foot on the Grimm's body, the other on the floor. She reared back, and her eyes flashed red as she pounded her fist into its skin. The flesh rippled and bulged for a moment, but the punch I'd personally seen cause a fissure in the Red Axe Guild did nothing. Yang yelped as she ducked back and avoided being crushed by its body.

It didn't notice us. Our attacks didn't even register to it. It looked like the others knew that too, for they all stared at the monster with uncertain expressions.

—Forged Destiny [Book 1: Ch. 12]