Merlin and Gaius

The relationship between Merlin and Gaius is quickly into a very strong mentor/father relationship, but not a renunciation or abrogation of his real father, Balinor, who Merlin meets in season two. Even after meeting his real father, Merlin maintains a very close bond with Gaius.

Trivia

 * It should be noted, in the entirety of the whole series, only once did Merlin try an grapple someone out of anger, and that was in Witchfinder when he tried to attack Aridean for trying to get Gaius executed for something he did not do.