Harada is one of the most cheerful of the Shinsengumi, He is usually making jokes with his friend Shinpachi and loves to makes other smile in a climax sometimes full of sadness and pain. He is very quick to get angry, but also very loyal and friendly. He prefer the spear to the sword. Sanosuke serves Kondo as personal adviser, in fact he always is been informative of everything and is a fencing master. He has a very proud determination. He also loves to have fun with his buddies, he gets a temper every now and then. He's just one of those big spirited people who enjoy living life and loves to make people around him be happy and at ease. You will always see him hanging around with Shinpachi and Heisuke since they are really good friends, and because of their wild personalities, they were named 'The comedian trio' by the other members. Anime Spoilers

Spoiler

Sanosuke does not die in episode 6 of the second season of anime after defeating Koudou's rasetsu army at Ueno. He fought alongside Shiranui. It is unknown what happened to him afterwards because he never caught up to Chizuru and Hijikata after they had taken a ship and left.

Visual Novel Spoilers

Spoiler

He is the only one that didn't became resetsu and in the game. He and Shiranui develop a friendship bond, the latter even willing to fight for humans to help his friend.