Of course he would run. Clarence didn't want to stay in such a dangerous place. His only bet, the device which was supposed to be hiding him, wasn't working for some reason, and there was a beast which he guessed to be a rank eight.
Clarence wasn't sure he could battle a beast at such a level even with the help of his weapons, not to mention he had no intention of taking them out in front of so many people.
Clarence immediately turned around and started running seeing that his cover has been blown, which meant he also couldn't take advantage of anything.
The man wrapped in black was about to give chase but the injured man in orange armour who had crashed recently held his arm and said,
"Ignore him, help them with the beast. We absolutely have to defeat it to get that item, or his help would be for nothing."