Is Moon aware of Eclipsa’s monster hybrid child? If she knew she might have only bluffed about St.O’s school and might never actually sent Star there so that both of them would never meet? Did the Commission sent said child to that school and expect her to just die of old age not taking account of her monster longevity? Is Meteora gonna challenge the Butterfly family for the throne now that she knows who she is?
Rhombulus clearly knew something about the Monster Sanctuary, and possibly about the existence of Meteora, but I got the impression no one knew she was Mrs. Heinous, and that she managed (I don’t know when or how) to conceal her identity for centuries. Apparently not being aware about it herself - we don’t know WHEN she lost memories though, if that happened when she was a baby, or more recently, after having already spent hundreds of years hiding.