Kouran must be deployed with a unit of Black Guard and may not voluntarily leave that unit. However, if Kouran is in your army, Black Guard are a Special choice instead of Rare. This means if you have both Malekith and Kouran in an army, you may take Black Guard units as Special choices and they are no longer 0-1. As a member of the Black Guard, Kouran is subject to the rules hatred and stubborn.
Building an army? Create, validate and share your list with New Recruit, army builder for Warhammer Fantasy Battles (6th definitive edition) and many more games.
Try the builder