This atmosphere-only fighter design was popular on Circasia in the 19th Century. Better in many ways than the dual environment Ruglin, the Skessa Atmospheric Fighter had better armor and a small profile. Most national guard forces operated Skessa Atmospheric Fighters for local defense operations because of their better atmospheric combat abilities and lower maintenance costs.
Note that the Skessa can only be operated in a scenario that allows for atmospheric fighter entry and combat. Even if a Skessa managed to survive the transition from atmosphere to vacuum, the cockpit would quickly depressurize, instantly killing the pilot.