Good thinking. Grigori has shared everything in the background that came with his character sheet. He stays in a tent just outside of the cave with his familiar and offers to do most of the physical or woodsy duties. He's generally been friendly with the other members of his coven, though he seems to have little tolerance for slacking or selfishness. When asked who trained him, he replies that he's never seen his instructor. A few months after he started living in the woods, he started getting strange messages. Some came in the form of whispers from an unknown source, others in notes tied to animals that approached him without fear. They taught him his first hexes, his first spells, how to bond with his loyal pig, and what it means to be a witch. When he had learned and demonstrated all of this in his daily efforts for survival, the messages stopped coming. He figured he'd learned everything they wanted him to.