I was looking at this page and I noticed that it has Shiki Erio listed as being in Golden Pharaoh/Miracat. Wouldn't that mean that she spent some time in hoshigumi? Right now she's listed as having been in tsukigumi since her debut.
She wasn't actually a member of Hoshigumi. The members of the 86th class also appeared in the Takarazuka run of Miracat - the first show following their hatsubutai. As the members of the 86th class weren't actually sorted until July of that year, she was still an unsorted ken-1 at the time.