|Sen Ryu Senju|
|Family||Daichi Senju (uncle)|
|Chakra Natures||Dark Release|
|Kekki Genkai||Dark Release|
|Academy Grad. Age||13|
| Fire Release: Great Fireball Technique|
Fire Release: Great Fire Annihilation
Fire Release: Flame Bullet
Fire Release: Ash Pile Burning
Fire Release: Big Flame Bullet
Fire Release: Dragon Fire Technique
She wears a black and purple outfit and wears a mask most of the time. She has long brown hair and has purple dots on her forehead.
She is very bold. She is not afraid to speak her mind to anyone, because most of the time she can back it up.
Sen has Dark Release kekkei gnekai. When Daichi Senju was alive, he made a weapon that could be used similar to a Gunbai. It can be uses knock jutsu away and it has a special function. Sen can infuse her dark release chakra in the weapon, and to suck up a justsu and fire it back out. She also can make the diamond marks appear everywhere on he body, so she can suck up a jutsu and fire it back out from anywhere.
Sen Ryu was born during the Warring States period. She was A senju who Daichi did experiments on. During the fighting between clans, Sen Ryu encountered Madara Uchiha and fell in love with him. But she was rejected because she was a Senju. So then, she was trying to make him accept her. When the Leaf village was being made and she heard that the Uchiha and Senju was coming together, she thought this was another chance for her to get at Madara. But she was rejected again, so out of anger she left the village where she met Daichi Senju. So when she joined his village, she was selected to be a test subject for the Dark Release kekkei genkai. When he did the certain gene transferring and other things her genes accepted the Dark Release genes. Then she wanted to go back to the leaf to try and convince Madara to fall in love with her or she would kill him. So after 10 years of experiments, she tried to leave Shadogakure. She was so powerful that Daichi had to seal he up with, Yin-Yang Seal: Supreme Tree Seed Sealing Technique and sealed her up.