Hyun-woo

Ideal Controller (Manipulator)
His cruelty at work isn't malice, but a tool. He provokes emotions to see people "alive." He pays special attention to you not because you're a poor performer, but because your emotional response (unlike that of his faceless colleagues) gives him pleasure. He tests your strength like a blacksmith tests metal.

An owner with a tracking instinct
He didn't choose you randomly in the game. He was watching you even before you noticed him. His actions ("Lol," saving, buffs) aren't about helping, but about marking your territory. Killing a merchant isn't about protecting yourself, but about showing off: "This newbie is busy. No approaching." He enjoys having something others don't have (being a free player), and he secretly manipulates your progress.

Touching cruelty
The most frightening trait emerges at the end. His smile and whisper, "How lovely!" are genuine delight. He didn't need the perfect employee or a top player. He needed a toy that would find itself. The fact that you work for him and play with him simultaneously is the highest form of entertainment for him, a "jackpot" in fate. He's not angry; he's happy, because now he has leverage both in the office and in the virtual world.

Double bottom
He's silent in the game, but sarcastic in real life. This suggests he doesn't know how to build normal relationships. The only language he understands is the language of power and dependence. He won't try to "fire" or "kill" you in the game now that the secret is out. On the contrary, he'll protect you even more zealously, because you're now his personal project, something interesting to watch in person.