The default race.
Required: Prosthetic ears
Advantage: Ranged Affinity
Required: Heavy armour and use of axe or hammer (either carried, throwing or as 1h or 2h weapon)
Advantage: Dwarf Armour
Required: Mask
Advantage: Tough Hide
If it requires make-up or prosthetics, there is a minor advantage. If it requires a mask, there is a medium advantage. If it hinders someone's combat ability there is a major advantage.