Apprenticeship

From Fiesta Online Wikia

Apprenticeship is a feature that does not exist in the game yet but will be released soon.

According to CL_Serric:

"The apprenticeship feature has not been fully developed yet and, as far as I know, isn’t available to date. I am not certain of the details, but if it works similar to other similar programs, it may give an exp bonus to players partying with their mentor. Until we have more official information on this, however, I cannot speculate."