Original concept design

The Siren is a creature from an unfamiliar Realm. Usually called upon for assistance by ancient demons, the Siren's purpose is to create a bridge between realms allowing its user and intended receiver to communicate. The Siren, bursting out of the earth's ground and standing over ten feet tall, draws in its selected person by playing a distinct musical rhythm through its many spinal cords.

 

https://www.artstation.com/artwork/k48n90