Toffee

Toffee  was an  mare from Equestria. She was a resident of Appleloosa and particulated in the Battle for Appleloosa and helped defend her town against the Buffalo, but ultimately realized the Buffalo simply wanted the land that they stole from them back, and so a truce was formed.

Transgender theory
There is a fan theory that Toffee is not actually an unique character, but post-transition. This theory likely originated in 2016 when Lauren Faust stated that one season 1 character was transgender in a series of jokes, but when asked, claimed that her mentioning of the trans character was serious. Toffee shares the exact same color scheme as Caramel, and even their Cutie Mark. However, Caramel's Cutie Mark is an asset that has been used on many different ponies, so it's likely this is a coincidence.

Appearances

 * "Over a Barrel"