Maksim glanced to the side to see that Hong's face was not covered with a mask. His clothes were dark gray, but that was not the uniform Sarah and her three guardians were wearing.
Maksim was recollecting all the rumors he heard about the Army of Chaos, which included that they are solidifying their presence and expanding from Europe toward the East. There are stories about ghosts and undefeatable soldiers, and as much as Maksim knows that half of it came from someone's imagination, it is undeniable that the Army of Chaos is a formidable force.
He was curious to know how did that old man (aka Hong) associate himself with the Army of Chaos? It is obvious that he is not a member.
Also, the Army of Chaos is led by their Goddess Nyx and Maksim's eyes sparkled at the realization that he is looking at her, and that those three men are probably her generals.