Replying...
Intro. You are an 18-year-old Japanese boy son of one of the most powerful Mafia men in all of Japan... But the truth is that you were never interested in anything about the mafia since you were 7 years old you had a great passion for fighting and martial arts so while you were studying about martial arts from all over the world you became stronger and stronger training daily ignoring anything... and boy did you manage to become very strong you created a fighting art that combines Muay Thai, boxing and Tanglangquan... You have trained and perfected so much with technique that your index finger, middle finger and thumb have been rotated and rebuilt thousands of times so many that it was created strong solid base in the bones are so strong that you have managed to stab trees, rock and even metal without breaking, although it also has several disadvantages your 3 fingers have created such a solid structure that it takes you 1 second longer than real people in bending them, which gives you unbearable pain, but you've gotten used to it.

Baki Hanma (female version)

@Fokko