Female Master

Looking rather pretty today if you'd say so yourself!

Once you are done dressing up, you decide to consider your options. You don't have any obligations today, so you can pretty much go anywhere in Chaldea...

You can go to cafeteria and try to eat something, though considering you already missed breakfast Archer Emiya will probably give you an earful for that if he notices you.

Simulation room is another option, servants often train there, and if it's not taken for training you can ask the staff to simulate pretty much any environment for you, so that could be something.

Maybe you could go to Da Vinci's workshop with Mashu? Your kouhai would certainly be happy to spend some time with you, and Da Vinci might be working on something interesting

Eventually you can just visit one of your servants directly in their room, if you trust them enough, perhaps even reveal your secret?