They are smaller and their head is bigger than their body.
111st Yoo Joonghyuk is cast outside of the scenarios.He finds himself in a "garbage dump" in the 73rd Demon Realm, where there are numerous discarded story fragments. Using these story fragments,he patches up his incarnation body, which was falling apart due to the penalty of being outside the scenarios. Once he is more stable, he goes to the Syswitz Industrial Complex and becomes the Revolutionary and eventually becomes 73rd demon King.