How is Lili strong?

I have never really looked into her story, but to me she just seems like "rich girl decided she wants to fight people" and used either some kind of super expensive training or technology to do it quickly.

She is easily one of the most acrobatic of all fighters in Tekken, and frankly her ability to fuckin LEAP is more or less superhuman.

Granted I am unfamiliar with her backstory, which is why I am asking. What makes her strong in universe and what kind of training (if any) does she do?