Cupid-Witch

Cupid-Witches are the cross-breed between a Cupid and a witch. Their magical abilities consists of powers from both their magical parentage. The only known half-cupids are the three daughters of Coop Halliwell and Phoebe Halliwell. The eldest and the first of this breed is Prue Halliwell, followed by her younger sisters Parker and Paris Halliwell.

The three sisters can be seen as the starters of the cupid-witches line. Similar to their ancestor, Melinda Warren, who started the line of Warren/Halliwell witches.

History
The children born of these two species was almost made impossible due to a couple of obstacles. However, it was later revealed that Prue's existence was actually destined.

Cupids are normally not allowed to have relationships with their charges whether mortal or magical, as it is deemed to be too complicated and dangerous by the Elders. Their parents' marriage and their eventual birth was almost unrealized, as their parents kept denying their feelings for each other to avoid heartache.

However, the Elders made an exception for Phoebe and Coop due to everything they put her through over the years. The couple was actually married by an Angel of Destiny.

Power and Abilities
The offspring of this union can inherit cupid-powers from their father, Coop, and will not require a Cupid Ring to activate their powers, possibly due to the witch-side of their magic. Since there haven't been many examples of Cupid-Witches, it's unknown what other cupid powers they will inherit.

Because of the heritability of magic, the three sisters will all inherit the basic powers of a witch from their mother, Phoebe. They may also inherit hybrid abilities, or pure wiccan abilities like premonition.

The first cupid-witch, Prue, came into her powers just a few months after her birth and has so far developed two different cupid abilities and has demonstrated full control over each of them.

The second Cupid-Witch, Parker, develloped her powers when she was three. She inherit a Cupid power that she quickly mastered but had trouble when she develloped the second one.

Paris Halliwell, the last Cupid-Witch, came into her power when she was six but didn't develloped any Cupid power yet.

Notes and Trivia

 * Phoebe's daughters are the only known Half-Cupids in the world.