WordNet sense 1 (showing courage):

feisty, plucky

WordNet sense 2 (displaying animation, vigor, or liveliness):

spirited

WordNet sense 3 (willing to face danger):

game, gamey, gamy, gritty, mettlesome

WordNet sense 4 (possessing or displaying courage; able to face and deal with danger or fear without flinching):

brave, courageous