There's Always Room for Another

It's already been long-since established that Lyra and Bon Bon are inseparable. But what happens if a third mare is added into the mix?

It started out with a somewhat average day. Lyra bought a cake from Pinkie and proceeded to accidentally drop it, Bon Bon went off to do some secret-agent-y stuff, and at some point, the former fell asleep on a bench. What makes this day unusual? There's a new mare on the ship.