The Protagonists Are Murdered by Me - Chapter 8: All aspiring hunters must go through a “debut” process to become a professional hunter.

... as a F-Rank by having professional hunters help you and obtain a professional license, it was an opportunity to gain ranks rapidly, or join a good guild if you did well in your debut.

The debuts were usually done in pairs or as many as four people at a time, and most of them went by quietly, but some aspiring hunters were different.

There were people who drew attention even before they became professional hunters.

Celeste for example was one of the most notable prospects.