9. Describe their happiest birthday.
ANY BIRTHDAY THAT DOES NOT INVOLVE RECEIVING CURSED SHOES THAT TURN INTO MONSTERS, KIDNAPPING HER BOYFRIEND, AND RESORTING TO UNSOLICITED IMPERSONATION
But seriously, every single birthday to Usagi is the best one. The one where she was three years old and had a puppy-shaped cake, the bowling party that every preteen is mandated to have, the Massive Senshi Slumber Party, the one where she willfully ignored Chibiusa for the sake of a surprise party and apparently traumatized her in the process. Choosing a favorite is like choosing just one kind of candy at the movie theater. Every birthday to Usagi is the happiest.