We've got a runner!
— Slaver Heavy Guard spotting an escapee
Slaver Heavy Guards are members of the Traders Guild. They are a melee-only variant of the Slaver Guard, and despite being called a 'heavy', wear the same armour of their non-heavy counterparts.
They are frequently found patrolling slave camps and guarding the gates, and occasionally accompany Slaver Caravans.
Occasionally, they lead raids into player outposts "not on the list", looking for fresh slaves. They will relent, however, if a base is too large for them to easily take down.