Defense Heroes
Defence heroes are your best bet at holding a point or controlling the enemy team. They can do high damage but are not very usefull trying to move forward and attack the enemy.
Bastion
Bastion is a robot that can form into a mini-gun and bolt itself into the ground. Bastion was left after a war between humans and robots and after turning back on it found self.
Hanzo
Hanzo is the brother of Genji and is part of the Shimada clan. He is trying to find forgiveness in himself for nearly killing his brother Genji.
Junkrat
Junkrat is an australian pyro-maniac who has travelled the world on a crime spree. Becuase of his talents in explotions he was recuted by Overwatch.
Mei
Mei worked for an Overwatch sub organisation that did weather reasearch in antartica. After a huricain she was the only one left out of her team. She then made an ice powered gun to escape the storm and decided to use the powers she aquired for good.