Sango :

Sango, her brother, Kohaku, and their father (the Okashira [Village Leader]), all lived in a village of taijiya [youkai exterminators]. It was their trade, and they were good at their jobs. However, the first night that Kohaku, 11-years-old, went to fight youkai with his older sister, father, and other exterminators, something bad happened--they ran into Naraku. Naraku used a spider demon to control Kohaku, and made him kill his and Sango's father and the other exterminators. He almost killed Sango, and ended up dying when the people who hired them shot Kohaku after his crazed attack of his family and friends. They also shot Sango full of arrows, thinking that she had gone insane as well. That night, everyone in her village was killed by a huge swarm of youkai, all controlled by Naraku. Obviously, poor Sango was mentally scarred for life. Though she thought Kohaku had died, Naraku used a Shikon shard to keep her brother alive in order to use him not only as a mindless drone, but also as a means to manipulate the Yasha gang since Kohaku is important to one of its members. Using her brother like this causes Sango loads of anguish. When she returned to her pillaged home, she found the Yasha gang, and immediately began to attack Inuyasha, thinking he had killed everyone. They sorted it out, and she is now part of the gang, also with a need to get vengeance on Naraku.

Personality:

Sango really loves her brother, and hates to see him being used. However, the only thing keeping him alive (he did did get shot by several arrows) is a Shikon shard in his back. She is trying desperately to get her brother back, not the lifeless shell that Naraku has made--the real Kohaku doesn't want to remember what he did (though he was forced) that awful night. She is a brave, kind, loving person.

Skills:

 I think Sango has the third-coolest weapon on the show. The first is Tessaiga, and the second is Tenseiga, but her Hiraikotsu [Flying Bone], a huge boomerang, comes in the third spot. She uses it to slice the enemy, whether it's one big youkai or a bunch of them together, and to block attacks. She can also use a small sword very well.