Her flesh is an immaculate red sea, as only a few scales disturbs the smooth flesh of that woman, reminding that she's indeed a fiend. But more than a few scales, her horns forces the looks, also with that pitch black eye and piercing blue iris.

Her body is sculpted into a provocative flesh statue, thick thighs into a large buttocks squeezing tight into a hourglass shape, those bulging abs leading to generous breasts that oftenly points through the fabric of her top.
Her red skin is marbled with molten yellowy orange veins, bulging from her ripped muscles, leaking the fact that her blood should look like molten lava. Her collarbone shows off in a fiendish way as the shape of her bone is sharper and brutal, slightly different from the usual human anatomy. Her sternum along with a few veins connecting to her eyes glows yellow and feiry, as if the thinnest part of her skin is on fire, literally radiating with a fiendish burning energy.

The smell of her sex is strong and potent. Working as a musky aphrodesiac, a mouth watering scent blurrying thoughts till the 'victim' gets feverishly horny but not only as it enhances their erogenous zones to their peak almost making them burning and too sensitive. It quickly grows into an ache to scratch either way, always poking into their brain over and over, making others thoughts more and more difficult as time passes around her, with quite the easiest way to get rid of that : having sex.
On the other way, leaving the fiend's presence lingers the effect, slowly dropping down but would be quite similar to a junkie's sobering, frustration building and that itch really wants to be scratched to release that "pain".
(I fully leave this effect to you, I'll only emote about it if your char reacts/shows it's under that kind of effect.)

What seems a black-ichor latex outfit is made out of a specific fabric, that is black ooze. It's apparently a black, latex looking slime that shapes into the look of her outfit, that is highly viscuous, wet and warm to the touch. It doesn't look like having more specific abilities rather than being able to take different shapes and hardens into a solid shape. (Visual reference, Venom from Spiderman, a black symbiot.)

Green
Shemale, Femboys, Female. Rough sex, rutting, mating. Long and girthy emotes. Exaggeration of real smut. Abondance of fluids, spit, semen, sweat, juice. Forced orgasm, Orgasm control, Multiple orgasms, Non Sync orgasms. Anal play. Tail play. Slaps/spanks. Breath control. Humiliation, Degradation, Markings, Tattooing, Branding.. and many more.

Yellow
Male model. BDSM (since it's more brain taxing, I won't be offering that all the time.)

Red
Full furries(Partial is OK), Scat, Pregnancy





Intimate bits.
It's thick and forearm sized, her sack being quite saggy, as there's more to it. Multiple demonic flesh thorns pointing back to its root adorns the whole length of her shaft, surely helping in locking that cock inside a wet hole along in forcing one's ovulation. That cock head is rather sharp sculpted, to the tip, giving quite the penetrating shape as its crown is overly girthy, making a frontier with its foreskin and also adorned with more thorns on its edge to really hook inside. Molten veins adorns its redness as well, radiating with a fiendish heat. Its hardness is overall humane too, except for that urethral pipe that is bulging the underside of that cock, making it look like a boney hard spine to the shaft from its root up to the tip. Those tiny red fleshy horns, bumps covers the skin of her wrinkled ballsack making it look a lot like a morningstar.
-> https://i.ibb.co/HpnZpwy/sample-447a38583d0bf82a6c5b05267891944b.jpg