He's a parasite that infected Uda's neck and jaw. Uda's Parasite originally does not have a name, but is later renamed Joe. He is brash and crude - it even seems to have a sense of humour, and sometimes assumes control of Uda's mouth, distorting it into odd shapes and forcing Uda to say strange or inappropriate things. <br /> <br /> (Source: Wikipedia)<br /><br />