Thanks for all the praise. <3 I'm happy that I can brighten up the quarantine for some people a bit with my game. ^^
I think the monstergirl you're looking for is the small spidergirl. She can be found in dungeons in Dorgania, and you can release her at the big farm in Central.
The maid you're missing is Grime. You only unlock her as an option with the headmaid when she's on her good path as a maid in your castle.