Whoknows
I got a few ideas who the rest of the characters could be.
Sunset Shimmer- Todoroki
Rarity- Yaoyarozo
Derpy- Tsuyu
Trixie- Monoma
Vinyl Scratch- Present Mic
Fancy Pants- Best Jeanist
Edgeshot- Mare Do Well- Edgeshot
Starswirl- Gran Torino
Fausticorn- Nana Shimura
All For One- Sombra
Shigaraki- Stygian
Kurogiri- Tantabus
Stain- Chrysalis
Sunset Shimmer- Todoroki
Rarity- Yaoyarozo
Derpy- Tsuyu
Trixie- Monoma
Vinyl Scratch- Present Mic
Fancy Pants- Best Jeanist
Starswirl- Gran Torino
Fausticorn- Nana Shimura
All For One- Sombra
Shigaraki- Stygian
Kurogiri- Tantabus
Stain- Chrysalis