Okay kiddo, let me explain what a liberius (praetorian prefect) is.
So, think of a big kingdom with a king as the ruler. The king has a bunch of helpers who help him make decisions and keep the kingdom running smoothly. One of those helpers is called the praetorian prefect.
Now, let's focus on a specific praetorian prefect named Liberius. Liberius was a very important person in the kingdom because he was in charge of the king's personal guards, who were called the Praetorian Guard. These guards were like the king's own special army that protected him at all times.
Liberius had a lot of power and responsibility. It was his job to make sure the Praetorian Guard was well-trained and ready to protect the king at any moment. He had to hire new guards, make sure they were loyal to the king, and punish anyone who wasn't doing their job properly.
Liberius also helped the king make important decisions. Sometimes the king would ask for his advice because he trusted Liberius's opinion. Liberius was like the king's right-hand man, always there to lend a helping hand when needed.
So, there you have it, kiddo. Liberius was a very important person in the kingdom because he was in charge of the king's personal guards and had a lot of power and responsibility.