Responses
Even if he does figure out she's his girlfriend, he's already said to himself "She's only 3!". Besides, I don't think it's unreasonable for them to take time and show how she handles her brothers dooms day which is fast approaching. She'll have to survive that before the emperor will allow her to date (if ever).

I don't care about the translationk, BUT CAN WE PLEASE GO A LITTLE FASTER? 232 EPISODES AND NOTHING WITH THE COUPLE! PLEASEEEEEEEEEEE!!!!