Argamis
Silver Dis-Astḗr
I like how it required an alicorn (Twilight) for the fusion to become a "princess"; but only after it absorbed a pony who once was an evil "she-demon" (Sunset), the fusion to properly reached the "Queen" Degree of Royalty.
-> At this point, the number of "voices" is so great only the Loudest [Pinkie Pie] overcomes all the chatter/debate/noise made by the others [so she is the "driver" once again].
-> At this point, the number of "voices" is so great only the Loudest [Pinkie Pie] overcomes all the chatter/debate/noise made by the others [so she is the "driver" once again].