Girlfriend X

Tommy finds Jen in a strange pod of sorts and she is unable to feel her legs, according to what she says. The pod opens and we find out why; her torso has been surgically grafted to a vaguely reptile-like beast, resulting in a singular creature that is fairly quick, tremendously strong, and uses quite a few weapons against the player. Seeing as Jen is unable to control the beast she is now attached to, Tommy must either kill the beast, and his girlfriend in the process, or be killed himself. When the creature is killed, Jen is still alive, begging Tommy to 'send me (her) to Uneekwa.' Tommy does so, and requests special training from Enisi to take revenge against the Sphere. This creature is spotted a few times before Tommy's fight with it but it featured a male human atop it. When he fights it the second time before fighting the Keeper, it has the male body on it. It is just known as the Creature X in those incarnations.