Sebastiane is a female with a body shaped similarly to that of a human with a sea snake's tail, in that it is elongated with blue scales. she has to thick thighs and a large tail fin. Sebastiane’s skin is a light blue. Her torso is humanoid with large breasts, Sebastiane's hands are humanoid, although she only has four fingers with claw-like ends. Sebastiane’s face retains a humanoid face with fish-like features, such as an anglerfish bulb on her forehead, fin-like appendages on his head, sharp teeth, a fish-like mouth. Sebastiane is wearing a tight diving suit with a mask, but her tail and head fins do stick out. Sebastiane is a Tomboy, not really sexual. She is 7ft tall. Sebastiane was made by Urban shade as a bio-experiment, her DNA was mixed with various under sea creatures.