We all know how Boromir has all the “protective big bro” instincts (Faramir can tell you more about it); So obviously, tiny hobbits activate his power.
The colors, or lack thereof in this gif makes him look really scary here. This is how I imagine elves in those dark fairy tales- severe and having the pallor of the dead but still ethereally beautiful. It’s cool how a bit of a shift in lighting can do that