The H.U.C. consists of individuals trained at putting themselves in risk so that others may rescue them. Due to the fact that Heroes have a central role in society, there's a high demand for those people to be used in training exercises.
Members of H.U.C. are capable of simulating victims of disasters and villain attacks as well as analyzing the rescue methods used by their "saviors", deeming them appropriate or not.
- My Hero Academia Manga: Chapter 109.