What kind of mentor-protege relationship you have will largely depend on the personalities of the characters involved, as well as how much of an age/experience gap there is. There are many options, from a Gandalf-to-Frodo type relationship to a cheery, family-like dad-son relationship.
Ideas for Mentors:
If you're more classically inclined, you can try the age-old 'wise sage' type of mentor. This kind of mentor usually works best with a relationship where the mentor is significantly more experienced than the protege, and tends to be more solemn and serious. These mentors are often more studious, though warrior-like characters can play this as well. Sage mentors are compassionate but firm, and a little distant. For a small twist, you could make your mentor more absent-minded and bumbling with every day affairs.
The other type of serious mentor is a more harsh one! These kind of mentors push their proteges and have a hard exterior. There are two types of these mentors: loudmouthed, verbally abusive 'drill sergeant' types, or more aloof, grim reticent mentors who rule with just a few words.
There are many other mentor types, but in line with our earlier archetype post, we've offered the most basic, common kinds. Feel free to play with this as you want! Keep an eye out for the next article covering proteges and join us on Achaea, a great free to play, no download RPG in the mean time!