Yes, I'm stubborn. And intensive "supersoldier" training which started when our whitehaired handsome adaptable flame was around 10 years old (intensive to the point that K' still hates everything related to regular training, including official sports competitions) surely had its results...
He can't boast the knowledge of various styles (it's like "I know many scary foreign words..."😉 but he has his personal mixed fighting style (includes elements of Jet Kun Do, Vale Tudo and a great deal of improvisation), which employs his strong points (speed, agility, firepowers).