Garrot's memory of their trek into the mountain wasn't the best, but he absolutely remembers being with Gyre and Luka as they were right next to Seth's body. The rest was a blur, but there were obvious similarities between the three Knights' wounds.

"What if you don't like his explanation?" Garrot's words are pointed, almost like he's trying to hurt the Princess. "What if he doesn't like you questioning him and he decides to kill you?"

Wouldn't be the first time the Protector has done that in the last day or so.