Honey Heart: Friendship Is Magic Book 6 - Loyalty

 

"And Rainbow Dash, who could not abandon her friends for her own heart's desire, represents the spirit of...Loyalty!"

-Twilight Sparkle, Friendship Is Magic-Part 2

Book 6 - Loyalty

Twilight has gone to the Crystal Empire to babysit Flurry Heart while Shining Armour and Cadance are at the annual Crystal Ball. Here, she meets new pony friends Bolt, Sapphire and Opal, and has to uncover an evil plot by the mayor of the Crystal Empire to turn all of the empire to dust.