So if you would like a pet or a slave you have two options. South Town has a place where you can get living pets or slave companions. North Town has a place where you can request custom built persacoms (robots), or purchase already made ones, and register them as your companion.
To become one of these companions, just post a regular character profile, then post at the top: pet, slave, or persacom. Then re-post your profile in the pet/slave shop for buyers.
People who work in the town and go to the school can own all three of these type of pets. Pets don't count as an enrolled roommate unless you would like to take them in with you. If so, you should go to the head-mistress to do so.
Once you get a pet from the slave shop, tell if you want them delivered or to take them home.
Midnight Heartbeats
This town is a place where anything can happen.