The Glyphweaver family's black sheep.
Grimble Glyphweaver is the younger brother of Wizholm Glyphweaver, and fell in with a bad crowd at an early age. For years, Wizholm had no idea where he had gone, only for Grimble to show up one day in an attempt to kidnap him. Grimble appears to be working for Billy Blind, but it’s pretty clear that he can’t stand his boss.
While Grimble’s ultimate goals are unknown for the moment, he apparently does still love his older brother. He is the one, after all, who gave Wizholm his magical staff. The problem will be if his goals and his loyalty to his brother ever conflict.