[@shamrocknroll]
Their skin tones in this world are closer to humans, but yes have noticeable grey/blue/green/purple undertones. They typically have sharper features, and some have small ridges about the skin.

Also, I should note that many Sirens have lost their ability to change their form at will. Without revealing too much the Sirens have been driven from their ancestral home in the Oceana Abyssal, and have formed small clandestine tribes lining the Dwarven cities of North & South Lubck. There are definitely still Sirens that can transform, but many still have found themselves landlocked.