You are resistant to fire damage but are also vulnerable to Radiant damage. You are also considered both a humanoid and a fiend.

You can speak, read and write Abyssal, Common and Infernal.

Due to your Infernal influence over the hearts of mortals you are proficient in Persuasion and Deception.

Your Charisma score increases by 2, and your Constitution score increases by 1.

Concubi reach full maturity by the age of 18. They cannot die of old age.

Concubi range in height and weight about as similarly as humans, however tend to posses a fit physique. Your size is medium.

You have a walking speed of 30 ft, you also have large fiendish bat-like wings that grant you a 30ft flying speed.You can only use this flying speed if you are in your true form. In order to use this speed while wearing light or medium armor it must be custom made to accommodate your wings. Even if a set of heavy armor is made to accommodate your wings its too heavy to fly.

Thanks to your infernal heritage, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

As an action, you can transform your appearance or revert to your natural form. You can't duplicate the appearance of a creature you have never seen, and you revert to your natural form if you die.

You decide what you look like, including your height, wight, facial features, the sound of your voice, coloration, hair length, sex, and any other distinguishing characteristics. You can make yourself appear as a member of another race, though none of your game stats change. You also can't appear as a creature of a different size than you, and your basic shape stays the same; if you're bipedal you can't use this trait to become quadrupedal, for instance. Your clothing and other equipment don't change in appearance, size, or shape to match your new form, requiring you to keep a few extra outfits on hand to make the most compelling disguise possible.

Even to the most astute observers, your ruse is usually indiscernible. If you rouse suspicion, or if a wary creature suspects something is amiss, you have advantage on any Charisma (Deception) check you make to avoid detection.

Your Draining Kiss is a natural weapon, which counts as a simple melee weapon with which you are proficient. You can only use this attack on a target that is Charmed by you. You add your Charisma modifier, instead of your Strength modifier, to the attack and damage rolls when you attack with this kiss. It deals 1d4 psychic damage on a hit. While you are missing half or more of your hit points, you have advantage on attack rolls you make with this kiss.

When you attack with this kiss and hit a creature that isn’t a Construct or an Undead, you can empower yourself in one of the following ways of your choice:

• You regain hit points equal to the psychic damage dealt by the kiss.
• You gain a bonus to the next ability check or attack roll you make; the bonus equals the psychic damage dealt by the kiss.

You can empower yourself with this kiss a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.