No. She does not appear.
It might be, as it does center on Fluttershy, but we have no way of knowing for sure until the episode comes out.
It is not known what these flashes of rainbow in the pony's eyes is supposed to represent, but this will likely be revealed in the Season Finale of Season 4 of My Little Pony: Friendship is Magic.
It is not known for certain, but it is very likely the case. That is what most fans seem to think and it has been hinted at in a tweet by one of the writers.
Rarity is voiced by Tabitha Saint Germain.
The very first episode "Friendship Is Magic- Part 1", all of the Mane Six are introduced and it is revealed that Spike is attracted to Rarity.
A character in the television series My Little Pony: Friendship is Magic.
Tabitha St. Germain .
My Little Pony Friendship Is Magic - 2010 Rarity Takes Manehatten 4-8 was released on: USA: 4 January 2014
Rarity is her full name. Some of the ponies have two-part names and some have one, such as her and Fluttershy.
Rarity acts like a fashion-nut. She's very picky and doesn't take no for an answer. You could say she's a little bossy.
The My Little Pony Friendship Is Magic episode with baby twilight sparkle is calledThe Cutie Mark Chronicles"this is where the cutie mark crusaders ask twilight applejack fluttershy rarity pinkiepie and finaly rainbow dash (not in that order exept for rainbow dash she comes last)
"The Art of the Dress" is from season 1 episode 14 "Suited for Success."