No she wasn't. Orpheus was added to gem gatcha back when they added 6 more himes to gem.
Go to the news tab under the kamihime game and go to "2017/05/08 22:00 - Advent Battle VS Rahab!!"
Yes that's why when i was at the start. I'm playing this game at the start of raid event of inferno. Rahab is near a month a go. if you mean by one month a go is recent.