Lately, Ein's hatred for the three traitors, Dean, Andre, and Sherry, has faded quite a bit. It was to the point that their faces faded from his memory, as only their blurred figures remained.
It must be related to how he's living his life much better since he became a dungeon master. But despite that, he can't forgive himself for forgetting his burning thirst for revenge at the beginning.
Now that Nyarlathotep had made him recall his grievances, he decided to never forget about them again. He swore that he'd definitely take revenge for all the other comrades who were sacrificed too.
"That's all of my business done here. Then, I shall take my leave," Nyarlathotep said as he started to float. His six cute protrusions, or legs, waved in the air as if he were walking.
Just before reaching the ceiling, he turned around and stared at Ein one last time. "Right, before I forget... Make sure to choose your friends wisely next time."
"What...?"