[@Jbcool]
Demons and Cultists as well... with the occasional psyker/sorcerer to keep everyone on their hooves. No CSM. 

As for symbols... The Helheim crew do have Aquila but honestly after some decision among themselves they are planning on having the Aquila dyed in their fur/painted on their armor on the front of their chests and on their backs (Thus making it a bit harder to justify friendly fire against them).