Sylvan is a Creature/Monster in The Witcher 3: Wild Hunt.
"Sylvans are cruel, greedy, and treacherous. Still, I prefer them to dh'oine. - Yaevinn, legendary Scoia'tael commander.
Sylvans and yakshas, a kindred species, are extremely rare woodland creatures whose appearance combines traits of goats and rotund men. These beings usually pose little danger, for they limit their contact with humans to playing harmless (though often bothersome) tricks and eating crops from their fields."
- Notes on Lore and players notes go here.