Grav was admireing some native animal, a small, fluttery thing when he heard the proctor asking if he would fallow him. Grav didn't know him, but his implants told him of his duty to the Emperor as a defender. So Grav trusted him. Seeing as his interagrator didn't need his help and that the commisar could handle with the few around, Grav decided to help the man.

"You go, I fallow, shield man." Grav said with his usual simple tone of voice. 

And with that, Grav checked Daisy, put his knife in his holster, and plodded next to the proctor.