Masquerade's Sukhoi Su-57

Masquerade's Sukhoi Su-57, also known as the "Belle of the Ball." is an advanced fighter jet that's owned by Masquerade (a high-society pony from Canterlot who would become a Yuktobanian rebel), and is an upgraded version of a Sukhoi Su-57.

In this Sukhoi Su-57, it features solid durability and high stability without sacrificing turning capabilities. It also has improved maneuverability, faster speed, an advanced weaponry system, an ability to perform data link, and is characterized by an increased in mobility combined with a massively modified fire control system that allows her Su-57 to use some armaments from advanced variants of a Sukhoi Su-57.

It's first seen during Operation Cornerfield in the Bastok Peninsula.