Tyrell, when he tried to beat down Arcanus. He got his ass kicked, but the fact that he even tried is impressive.And after that, he still has the balls of steel required to look him in the eye and shout out "I'll flatten you!" during the final dungeon.
Volechek, both when he stays behind to face the consequences of his actions in Morgal, and when he refuses to let his sister sacrifice herself, pushing her right out of the way and ending the Eclipse himself. Both are also Tear Jerker material; the latter additionally qualifies as a Crowning Moment of Heartwarming.