Some of the main characteristics this plane could have is
- high maneuverability at high altitudes (like the ability to do a cobra)
- high speeds (between mach 1,7 to mach 2)
- high payload capacity (mainly bc of its massive wings)
The main feature this plane could add is recon which i think mainly could be a supporting feature like it could spot enemies and send the data to teammates (like the amount of enemies and the type) which could help teammates prepare.
But rn thats all i have thought about so pls leave some recommendations if you want.