itch.io

Alraune, since she is a Alraune, her lore might be the same as all others.

"Alraune, are being with intense sex drive with no concept of love, created from the intercourse of a Mandrake, and a Witch"

Pixie, is the closest thing we have to a Witch, or a Horny Succubus, did something to a Poor plant. 

The Other concept would be even worse. 

"Blood and Semen of hanged men dripped into the earth eventually grew a Mandrake with an Intense use for love Potions, Witches would also use them for intercourse creating the Alraune"

So yeah all we know is a Witch probably banged a random Hole, or a guy died Ejaculating. 

Thanks, and don't forget that these are monthly releases, which with game dev'ing, really isn't that much time!