They are a Corpse Siren
they mimic the appearance of a corpse to attract prey and scare people off
usually unsociable (Márgot is an exception)
omnivorous
they live in costal areas
they are a semi-aquatic and can move well in land and sea
They have 3 forms:

True form

Corpse form (they can manipulate the appearance of their "hair" to look like normal human hair)

"human" form (they use a thin layer of their natural "hair" on their body to hide their inhuman traits and blend in)
#StellarOcs