Once Ravencrown agreed to listen to her, Eleanor started to divulge everything she knew about Ace except for the fact about his 'clone.' Although she knew this might put Ace in an even more dangerous situation, she knew he would be in even more danger if she didn't make it important in Ravencrown's mind.
Furthermore, since this was also Ace's plan, she wasn't breaching the Law Contract or undermining Ace's trust.
Ravencrown didn't seem interested initially, but the more she heard, the more incredulous she became and attentively listened.
After Eleanor was done, Ravencrown was silent and seemingly deep in thought; Eleanor's lips curled slightly as she knew Ravencrown was hooded!