Carlos has parasitic tendencies. He crawls through any orifice, then crawls up the spinal cord to the brain. He latches onto the brain, sucking nutrients from the brain. He also controls the host, kinda like that one type of flatworm and the horsehair worm. The host also gains some of his physical attributes, such as his wings, tail, crab claws, etc. After he's finished, he then grows to normal size while in the victim, making them explode.