Succubus/incubus blood running through their veins makes succubi/incubi charming, and from understanding what they are, they became wise, but as non-warriors, they aren't very much of fighters when alone.

+3 Charisma, +2 Wisdom, -1 Strength, -1 Constitution

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.

Your claws are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d4 + your Dexterity modifier, instead of the bludgeoning damage normal for an unarmed strike.

You have a flying speed of 50 feet. To use this speed, you can’t be wearing medium or heavy armor.

Starting at second level, you can use some loose quills on your wings as a ranged attack, up to 30 feet away. You deal 3d4 of Piercing damage. You can only use this ability twice per short or long rest.

A creature you kiss regains a number of hit points equal to 1d8 + your Charisma modifier and has an advantage on the next attack roll, ability check, or saving throw they make within the next minute. This has no effect on undead or constructs. You may use this trait once, regaining use after completing a long rest.

 The Healing done by Healing Kiss increases by 1d8 when you reach 5th (2d8), 10th (3d8), 15th (4d8), and 20th (5d8) level.

Draining Kiss/Bite

The Succubus/Incubus kisses or bites a charmed or willing creature. The target must make a Constitution saving throw against your Charisma Spell Save DC (8 + Charisma + Proficiency), taking 1d10 + Charisma Modifier psychic damage on a failed save, or half as much damage on a successful one. You gain a number of temporary hit points equal to half of the damage dealt rounded down

The target's hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the target finishes a long rest or the Succubus/Incubus that performed it is killed.

After the target takes damage from this attack it can make a saving through with an advantage against any charming effects you have on it. The target dies if this effect reduces its hit point maximum to 0.

The damage of Draining Kiss/Bite increases by 1d10 when you reach 5th (2d10), 10th (3d10), 15th (4d10) and 20th (5d10) level.

You can cast Charm Person and Spare The Dying once a day.

When you reach 2rd level, you can cast Divine Favor and Mage Hand, each two times a day.

When you reach 5th level, you can cast Dispel Evil and Good once per long rest

When you reach 7th level, you can cast Conjure Celestial or Fiend once per long rest

As an action, you can telepathically communicate up to 10 words to a creature you can see within 60 feet.

You can use your action to change into a medium humanoid form, or back into your true form. This form can mimic any normal humanoid, such as humans, orcs, tieflings, and elves. Without wings, you lose your flying speed. Other than your size and speed, your statistics are the same in each form. Any equipment you are wearing or carrying isn't transformed. You are considered a Shapechanger or a Shapeshifter for the purpose of spell effects.

Some fiends enjoy manipulating their prey, while others prefer to seduce them. You have proficiency in Persuasion, Deception, and Intimidation skill.

Your heritage lends you insight into both the celestial and infernal. You are proficient in the Religion skills.

You have resistance to fire damage, necrotic damage, and radiant damage.

You speak Common, Celestial, Infernal, and Abyssal