good guy

noun2

1. •
   (informal) An all-around pleasant person; usually a man.

   • He was a good guy to visit with and be around.
2. •
   (informal) A hero, particularly a protagonist in a story.

   • “What stops armed bad guys is armed good guys,” Senator Ted Cruz suggested in the wake of the Uvalde shooting, echoing many other gun rights advocates over the years. — 2022