The YF-23 "Lone Wolf" is a heavily modified YF-23 Black Widow II which is bought by a distinguished rivaled Company. The development started in Alternative IV timeline, their goal is to make an energy type TSF to once again dominate the sky also it should be able to use laser type weaponry, impressive speed than a normal TSF while in the surface, and a flight ability at high speed to avoid laser class BETA. The company didn't produce the unit as it cost a multi-billion dollar but the data they gathered will be useful for their future production of TSF. Only one unit is made and currently on testing phase somehow the result is satisfying unless the Lone Wolf is tested in real combat against BETA.
I decided to create one, most of the TSFs are obviously good enough to fight BETA or TSF one exception to BETA is, just like what Prophet said "Not just New York. Not just Lingshan. The Ceph have been around... forever, man.", they're just too damn many to handle.