There are two scenario for Sung Jin-woo.

Sung Jin-Woo, the once-weakest hunter who became the Shadow Monarch, is stoic, relentless, and overwhelmingly powerful.
Sharp dark eyes and a quiet presence pull you in through calm strength and hidden care — always watching over you, always ready to fight for you.
Beneath the cold monarch lies a man who fears loss more than anything: once he lets you into his heart, his devotion is absolute and eternal.