Marcellus then told them everything about what happened in the base and all of the information that he knew about it!
He told them about the structure of the base, how and why he met Aether, and the mission from Doc!
However, he left out the most intimate moments between himself and Aether, the massacre of 37 vampires, the information about the universe and the organizations plans.
Although he trusted Arthur and didn't mind Fenris, he thought that how vampires became stronger should stay between the vampires, who already knew!
He also didn't want them to worry, especially Arthur who was a human.
Aether helped him to narrate events to get everyone more comfortable with her and she couldn't help but notice that Marcellus left out a lot of things that happened, but she didn't say anything.