[spoiler discussion] What does Beatrice know?

Does Beatrice know Satella personally? I just rewatched some parts of S1 ep 17, 18 and Puck mentioned Satella's 2000 unseen hands (actually just realizing 3 people got those hands for sloth wf, wonder what Flugel got), so I guess he was acquainted with her, especially considering Echidna knew her. Furthermore I think Roswaal and Beatrice both know about Subaru being a Sage candidate but never told him much about it, even going as far as dodging the question.What else does she know and why doesn't she share some stuff with our poor oblivious mc :( Any thoughts and corrections appreciated! Maybe I am totally missremembering some things here since it's literal years since I last heard much about this. She is also in on Roswaals plan, no? When they talked in Echidna's tomb alone? TL;DR (not a tldr): Season 1 is a masterpiece and Emilia ep17 one liner fck hit hard (taking to subaru before he (satella) kills her) Edit: Does Beatrice know Subaru got multiple witch factors? I feel like Puck was able to read and change Emilia's memories when they forged their contract, or was it just emilia herself?So i always wondered if Beatrice could tell how fucked up Subarus Od // Soul is. Multiple WF and literally Satella chilling in it. Hmm. Roswaal prolly knows Subaru got a WF since he knows about RBD since Arc 4 and prior, but Betty didnt notice Als Authority right away, I suppose. Or did she in Arc 5? Did she comment on Al?