There's in fact no real name to this creature, since no one really "lives" to tell of its existence. Some say the name "Inout" derived from it being twisted inside-out, and some say the name came from the creature's sexual-like features and appearance. The creature's head and tail are the same, both containing a big long mouth that splits the intestine like head in the middle. It's not meant to kill or attack since everything in hell is already dead. The subtle long mouth seems to carry a big evil smile as if it's mocking at the restless soul that's doom to the eternal hell.