Your Dexterity, Wisdom and Charisma score all increase by 1.

Alu-fiends mature a little faster than humans; like half-orcs, they reach adulthood around the age of 14. They can, however, live for several centuries; gaining a significantly longer lifespan from their Succubus/Incubus half.

Alu-fiends can range from 5 to over 6 feet tall. Your size is Medium.

Your base walking speed is 30 feet, flying is 60

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

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.

You have resistance to fire damage.

When you reach 3rd level, you can cast the charm person spell once and need to finish a long rest before you can cast it again. When you reach 5th level, you can also cast the alter self spell once and need to finish a long rest before you can cast it again. Charisma is your casting ability for these spells.

Your claws are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike. damage dice increase level 5,10,15

The fiend kisses a creature charmed by it or a willing creature. The target must make a DC Constitution saving throw against this magic, taking 1d10 psychic damage on a failed save, or half as much damage on a successful one. 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. The target dies if this effect reduces its hit point maximum to 0. The damage dice increases each level by 1, 5, 10, 15 with 1d10, 2d10, 3d10, 4d10

You know the thaumaturgy cantrip. When you reach 3rd level, you can cast the hellish rebuke spell as a 2nd-level spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the darkness spell once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.

As an Incubi of breeding, once per long rest you can enforce a nat 20 in damage to the opposite sex/outside combat gain advantage on charisma checks for 5 minutes, or as an Incubi of homosexuality, once per long rest you can enforce a nat 20 in damage to the same sex/outside combat gain advantage on charisma checks for 5 minutes

The fiend ignores the range restriction on its telepathy when communicating with a creature it has charmed. The two don't even need to be on the same plane of existence.

From the blood of an Incubi/Succubi, you gain the Disguise Self spell at level 1, Change Shape at level 6

When you score a critical hit with a melee weapon attack, you can roll one of the weapon’s damage dice one additional time and add it to the extra damage of the critical hit.

Your skin is scaled and hardened due to your demonic lineage. While unarmored, your Armor Class is equal to 13 + your Dexterity modifier.