Forest is the son of Marshall Law. He has been training at his father's dojo since childhood, and some even say that his martial arts skills exceed those of his father's. Paul Phoenix has taken a liking to Forest, and they often get in trouble together.
A deinonychus trained for military purposes, Alex is a vicious animal that was created by extracting dinosaur DNA from an insect trapped in amber, with gaps in the DNA filled in with genetic data from Roger. Alex does not seem fully mature yet, but currently has about the same fighting strength as Roger. Alex will become an extremely powerful animal once he fully matures.
A prototype version of Jack developed in Russia. After learning of Jack's upgrades, P-Jack requested an upgrade from Dr. Bosconovitch, as well. Dr. Bosconovitch complied by adding a rotation function to P-Jack's limbs, as well as flight capabilities. P-Jack loves sunglasses, and they have become his trademark.
Tiger is a mysterious man who entered the "The King of Iron Fist Tournament" dressed in clothes inspired by the golden age of soul music. His polished capoeira moves look quite similar to those used by Eddy, but the nature of the relationship between these two fighters remains a mystery.