1.The juniper monster-form doesn't have a scene, but beating her unlocks a scene for her human form.
2.As Otbitaya said, you can return to the factory, just go past the jungle and go to the portal instead of challenging juniper.
3.I wish we could fuck everyone we're showing, but though decisions have to be made :( I prefer to have cool background characters that are just there and sexy than no characters. Maybe Europa if we find time to squeeze her in somewhere. Smashing the rat sisters, don't think so :(