itch.io

Not including DLC there is a total of 12 workers you can have (you can only recruit 11 of them because Tasha already works there).  This includes Cleo that you can recruit, but not as a maid.

You can feed Olivia the sandwich. No idea how many girls there are. I didn't count. All I know is whenever you hear a bell ring when you encounter 1 in public that girl can be a waitress. 15 girls total. It will go down to 14 because one of the girls leaves later on.

You can feed her the sandwich eventually.  Keep ordering desserts from her until the times Gemini says she's somewhere else.  In this order, you find her:

1. At the movie theater in the mall

2. At the park (choose wander around)

3. Randomly by exploring the city

A few desserts after #3 should be an option to give her the sandwich.  Then next place you find her is in the bookstore in the mall.  Free her there, and next time you see her in the maid cafe she'll be at her max weight.