You have uncovered an early preview of the Clockwork Companions, robots designed to look like young girls with animal-like features.
They were created by Dr. Margaret K. Sound for the purpose of helping keep people safe by taking care of high-risk tasks at various jobs.
Don't worry, they're the playable heroes of Gear Gals, and are incapable of ever feeling the emotional desire to cause harm to anyone.

Also try what you did with the N key as well, if you so desire.

Care to cuddle with a Clockwork Companion?
And of course they have nipples, that's so you can tell that they're girls, and they canonically don't have anything 'down there' because I said so.

No additional secret messages other than this one just showing off what I learned how to do here.