I'm writing a hie story and one of the main characters in it is a young martial artist. And i know there's like a wide variety of martial arts and i may need to have him know some certain specific ones. So are there any types of martial arts i could use? Some that involve fast paced punching, kicking and using move sets that can be unpredictable and stealthy?

1986556 If you look up the fighting style for Leo (Tekken), his fighting style might be good to be inspired by. Mostly, there is a lot of fighting styles Tekken consist of on many characters, so you might be good on that. In my opinion; Leo's fighting style is one of the world's powerful martial arts since it consists of of counters and devastating attacks to severe parts in the human body.

Go on the Tekken Wiki, that will probably help you out.