A female gnoll I'm playing in a camp in which they tend towards mimicking various aboriginal cultures.
In this case, I am personally rather obsessed with those about the Salish Sea, being a native here and having grown up among it.
There's no specific symbolism, its not a direct reference to any particular mask or the like, its simply supposed to be indicative. Besides, generally Salishan art is supposed to be very unique to each artist. So to be fair, most anything goes.
This is rough, was just a color comp in a campaign.