"Welcome back, Blood!"
And all of a sudden, Emma has wide eyes after hearing the Dungeon Boss call Blood's screen name. If her intuition was right, Blood never told or mentioned his screen name to this monster.
Of course, it came to her mind that might be the monster hearing it while they were having a conversation earlier. Eventually, she slowly shook her head as she was positive that was not what the reaction of the monster meant, it was way more complex than that. Or maybe, the dungeon really knew this ranker.
It was impossible as the monsters in this virtual reality game have made to become aggressive and attack the rankers. They just became different when the monsters were part of the Main Hero Quest. Emma would understand if this monster mentioned different names. But calling him directly with his correct screen name? This was unbelievable.