Qin Zangdarv

Name:Qin Zangdarv
Age: 23
Naton: Fire Nation
Water/Fire bender (explanation below)
Looks: Grey hair, Wears a black robe with a belt and scabbard, Has a sword and a knife, 6', Blue/Red eys, (explanation below)
History:
Qin has one fire bender parent and one water bender parent. Qin was born along with his twin named Han. The fire nation found out that Qin was a fire bender and Han was a water bender. The fire nation then asked the parents if they could have the children. They told them that they would be doing a series of tests to see if they could make a duel bender. When Qin's parents refused, the fire nation's soliders came and killed them. The two babies were taken to a testing facility.
At the facility, many tests were premformed. After the tests, a doctor came a prefored an experiment on them. The experiment was suppose to give half of one childs power to the other child. However, the test went wrong. There was a bright flash and when the doctor came to his senses he saw only one baby. He later found out that the identical twins had morphed together.
The doctor could never forgive himself of this tragedy. The doctor decided to raise the child as his own. He named the child Qin after the older twins name. As young Qin grew up, he found that he was a fire bender and a water bender. However, he was only able to do one at a time. In order to fire bend, he would have to change. He could never explain the feeling but when it was over he would have red eyes. If he did the process again, he would have blue eyes and would be able to water bend again. The doctor explained this phenomenon was when he changed who was being the dominant twin. The doctor explained to Qin that he was really two people. Qin however, only felt like one person. This is proable because the to twins where identical and in the same body for most of their life.
Qin's childhood was hard. Everyone loved and hated him. They loved that he was a fire bender but hated that he was water bender. As he grew up, He biggest desire was to split himself back into two seprate people. That way, the water bender could go to the water nation and be accepted. Also the fire bender could stay and become wantever he wanted to become. When Qin turned 17, he joined the army. He was hired as a bender assassin. He was very successful. When he turned 23, he discovered that a "cure" to his unique problem could be found in the water nation. He is now traveling to the water nation at this very moment. However, he has anouther reason for going. He has been assigned to kill Akira Thao.
(I hope there is no mistakes because I'm too lazy to proof read this)
(this is a picture of his water bender form but I was unable to get a picture of his fire bender form)

What's up with all the double benders? (not that there's anything wrong with them, I'm just curious.)

Accepted.