In her defense, it’s not exactly something you weren’t aware of. You’ve just never seen one that particular… shape.
You haven’t! But that’s a good idea! Or, it would be if it didn’t involve a child willingly approaching a dentist. That’s like trotting up to your natural predator. Not out of the question, but certainly out of your comfort zone.
Lyra is pretty good friends with… what was her name? Derpy? Ditzy? … Dinky? No wait, that’s her daughter… Bubbles…? We’ll just call her Miss if we find her.
You also seem to remember Lyra talking with Berry Punch a few times. Golden Harvest too. Lyra knows lots of ponies. But, between your aunt and her roommate, that’s at least four you could choose from.