Mandatory Changes
☑ Gills on the side of his neck
☑ Scales on his arms and legs (carapace)
☑ Fins behind his ears
☑ Fins on his forearms (pleopods)
☑ Webbing between his fingers
☑ Fins on his legs (pleopods - out of water)
☑ Webbing between his toes (out of water)
☑ Tail while in water (rain water)
☑ Sharpened senses
☑ Resistance to water pressure
☑ Thirst for water
☑ Preference for cold weather
☑ A need to feed on human energy

Optional Changes
☑ Fog form
☑ Scales on other parts of the body (carapace)
☑ Dorsal fins; incomplete
☑ Bio luminescence; incomplete
☑ Draining water from victims via a kiss/cut
☑ Soothing singing voice
☑ Retractable claws
☑ Poison spines on fins claws.
☑ Instinct to hoard
☑ Water powers
☑ Antifreeze blood

Psychological Changes:

☐ Gill flaring response
☐ Creating noise in response to perceived threats or danger