Kreed and Envrie were lab made. They have no parents or siblings as they were built from cells plucked form different creatures in the lab. They share multiple gene combinations from many other different organisms. When Kreed and Envrie were made they were the first of a very particular experiment. As they got older they experienced many different tests. One of these was where they were placed into a sound proof room that would normally limit their senses. Removing ALL light and all sound in these cases as ways of testing how much stronger their senses would be and how having two heads would change this. They also have a scar on their chest from another experiment. Now because Envrie and Kreed were made so oddly they had no actual gender. None at all as far as their physical body went. Doctors tried to implant female organs but Kreed and Envrie's body rejected it and they pieces had to be removed quickly leaving the large scar on their stomach. The reason their body rejected it was because they identified as male and their body, because of this, rejected the female organs that the doctors planned to add. The other tests the two faced involved being held in pens with other experiments to see how they would fight or defend themselves with two heads.
This went on for several years until they escaped, a drunken worker leaving their cage unlocked by mistake. This gave them their chance, though it was still hard to get out . They ended up killing a couple of the guards there and then one of the other experiments who tried to stop them. It was a long journey from there until they made it to these woods.
Did Kreed and Envrie's History incase some one is interested. It kind of lacks detail but that is the basic description.
