(This race build is heavily adapted from the work of Reddit user kgd95's PDF, Bastards and Bloodlines - Half-Breed Races converted from 3.5 to 5e v2.0. Thank you kgd95 for the time and effort you put into this. These races are both exciting and balanced.)

Dhampir (Human/Vampire)

Sometimes spelled dhampyre, dhamphir, or dhampyr; Dhampirs are the unholy union between a human woman, and a male vampire. Vampires often stalk women at night, waiting for a perfect moment of vulnerability to strike. When the opportunity presents itself, the vampire swoops in, and bites the victim in the neck, making her his thrall, or his magically charmed, unwilling servant.

Vampires are insidious creatures, that play with their servants over a period of time. If the vampire so desires, he lures the charmed woman to his lair. It is there that he impregnates the woman. This is how Dhampires are born. For inexplicable reasons, the mother almost always perishes during the birthing process. If they dhampire infants are not killed immediately after birth, they are often orphaned, and forced to live a life of solitude and distrust.

Not Quite Human

Dhampires are elegant looking humans, with grace and confidance oozing from every step they take. They are often good looking humanoids, with sleek, black or white hair and cold, piercing eyes. They look nearly human, except they tend to be slightly thinner and taller than humans on average. Depending on their mother, they can have remarkably pale skin, while those with dark complexions might be grey or purple toned. Some Dhampires may have 2 menacing incisors that reveal themselves whenever a Dhampire smiles or bears it's teeth, while others are less pronounced and resemble that of their human heritage. 

Dhampires can almost pass for human. In small communities, the subtle differences will eventually tip off the townsfolk. An angry mob might form with a mission to crucify the would be "vampire" or at the very least, drive it far away from town. In a large urban sprawl, a vampire can much more easily blend in with the crowd, especially since there are often much more visually striking oddities roaming around, catching everyone's attention. Regardless of the community they live in, or how human Dhampires look, they just can't shake the fact that they exude an overwhelming sense of dread or impending doom towards whoever they interact with. The feeling is visceral and supernatural in nature.

Children of the Night

As a result of being orphaned, ignored, shunned, or hated; Dhampires tend to be loners. They struggle to make friends, or really any meaningful connections with others. They are quiet, preferring to keep to themselves to avoid trouble. A loud, boisterous Dhampire is asking to be put in an early grave by holy folk or fearful serfs.

On the flipside, Dhampires consider those who do accept them as diamonds in the rough--that is-- rare cronies that don't want to see them burned alive. These friends of a Dhampire, either do not succumb to their feelings of dread or do not apparently suffer from these feelings at all. Once a Dhampir makes a friend, unless some unfortunate occurrence drives them apart, they tend to be friends for life, and a Dhampir will do whatever they can to keep them healthy and happy.

Spurned by the world

Often left for dead, the lucky few Dhampires that do get saved from the elements and eventually foster parents form an uneasy bond with their caregivers. As a Dhampir reaches maturity, their caregivers see them more and more as monsters. Their vampiric origins become apparent, and while they were once offered a loving home, it is overwhelmingly common for Dhampires to be driven out of such homes-- sometimes with weapons pointed at them, threatening their life. So these rejects of society are forced to roam the world, tirelessly looking for a place to belong.

Contrary to popular opinion, Dhampires are not necessarily evil. Though many do succumb to their darker nature, or are driven there by how society treats them, many grow to abhor the very creatures responsible for creating them, and seek to destroy them in any way they can. Their motivations may be primarily vengeance, but such Dhampires often do so because they want to rid the world of evil, and destroying vampires is a logical place to start since they already have a personal vendetta with one.

Other good dhampires may simply just want to fit in and live a normal life. They are driven by an insatiable need for normalcy, even monotony in their lives. Dhampires may not be driven to destroy evil or protect others, but rather to just subsist and interact with others without having to flee from town to town or having to worry about plots being devised to destroy them.