“Even one emperor cannot sit on the throne, and you propose a diarchy, dear brother?”  
I present to your attention - Groveroness! Sitting by the fireplace, with a mug of hot cocoa - I again plunged into my delusions and began to invent the illegitimate daughter of Grover V. In my vision, the young emperor was checking out with some charming person in the royal garden, and the result was predictable. It seems that there was not yet a priest with him, which could scare off a gaping noblewoman from a noble family.  
Continuing the flight of fantasy, I imagine that this griffin pressed the matured Grover VI on the throne, even when they established their family ties.