The first hermit-like character that Percivale meets - a "recluse" (540) - happens to be his aunt, who explains to him his quest and that he must head for the Castle of Carbonek, where the maimed king and the grail lie.

Later on, Percivale is met by an old man who comes to him in a ship:

Than was sir Percivale ware in the see where com a shippe saylyng toward hym, and sir Percivale wente unto the ship and founde hit coverde within and withoute with whyght samyte. And at the helme stoode an olde man clothed in a surplyse, in lyknes of a pryste.
The old man interprets a dream that Percival had and in doing so, warns him about the impending temptation that he will face. Despite being warned by the hermit, Percivale falls into a certain measure of sin (he almost slips into bed with a beautiful lady, who is the devil in disguise) and is chided by the hermit when he returns later.

Selections from Thomas Malory's Morte d'Arthur. Edited by Eugene Vinaver.