With six versus four main characters, though, I guess Rarity has to be cast as the famous musician on tour in Japan early.
Leon and Daley?
Pinkie, being Pinkie, can just be around and freinds with them all because she's Pinkie. And possibly still a pony instead of human, and no one thinks this is strange. Well, not for Pinkie.
That works, too.

--
Rob Kelk

"Read Or Die: not so much a title as a way of life."
- Justin Palmer, 6 June 2007