Celestial Undeath. Your creature type is Celestial and Undead in addition to Humanoid. Additionally, you are vulnerable to radiant damage but immune to diseases.

Lost Life. Your body was once another race. Please choose a humanoid race for your appearance and create 3 to 5 bullet points of your past life. These will be all you can remember.

Psudo-lust. You are magically compelled to move and dress provocatively. This takes the form of a little voice in the back of your head giving you positive reinforcement any time you comply, such as: "You/I look so good in these heels.", "You/I should practice hunting/pick-up lines", "Good job/boy/girl.", or other such things. Any time you purposely avoid such thing your little voice says thins like: "What your/I'm wearing is too stiff and restrictive." and "That one would be such an easier kill if you strut a bit more." This isn't true lust, more like the dark magic in your blood telling you how to be an effective killer. Furthermore, your character will slowly lose its inhibition regarding such things.
Finally, blood is highly addictive. That's ok though because the voice says not to worry about that. "It tastes good so it must be good and you're a vampire, you're supposed to drink this stuff!"

Enhanced Darkvision. You can see in dim light as if it were bright light, and in darkness as if it were dim light, out to a distance of 120 feet. You can't discern color in the darkness, only shades of grey.

Sunlight Sensitivity. You have disadvantage on attack rolls and Wisdom (Perception) checks that rely on sight when you, the target of the attack, or whatever you are trying to perceive is in direct sunlight.

Go for the throat. You can use your teeth (1d8 Necrotic) as natural weapons. On a hit, your next attack has advantage but on a miss your target gets an opportunity attack against you.