Knife-Grinders were individuals who sharpened the blades of weapons for money. Mostly, they were young, unenducated and poor Undertowners, which was why Rook was wearing a knife-grinder's clothes and tools on their secret voyage to the Free Glades.
Notable Knife-Grinders
- Vilnix Pompolnius
- Millcrop
- Rook (but only as a disguise)