How people managed to figure that one out without help is beyond me. I tried to do the head tilt, but to have the negative space and read it bottom-up, damn that is complex.

I do know the translation of said code: YOUR RETURN CHANGES NOTHING, SCHEMER. MY MASTER DOES NOT FEAR BROKEN GODS and ARROGANCE. YOUR POWER IS NOTHING TO BE AFRAID OF. RIDDLES AND WORD GAMES.“ 

So we have a powerhouse going on here. If we look at the context again:

Doorman’s boss is a woman, someone who knows Snake well. Or someone Snake knows. And she seems to be injured or affected in some way/shape/form. And while Snake may no longer be in control, he still has power. Enough for Doorman to still fear.

Honestly this one of the most interesting scenes by far