One summer night, the guys were out fighting the Foot again, but there was also a young woman with them in a Foot suit. She was out with her brother that night and the others. She wasn't ready for the full face off against the turtles yet. She hadn't had the complete training to do so. She had just wanted to be along, but when they ran into the turtles, she took cover.
She was of Japanese origins.
While she was watching all the fighting, she wasn't sure which ninja was her brother. But she could tell the turtles apart from the weapons they fought with and different mask colors.
The girl was worried about her brother. She was also most concerned about the blue masked turtle, since he fought real well with katanas.
Then, the next thing she knew, there was a loud male scream, and the blue masked turtle had his sword in the stomach of one of the ninjas. The girl thought she had recognized the scream.
Leo removed his katana, and now, since most of the ninjas were unconscious, the four turtle brothers took off into the night.
The girl came over to the ninjas after the turtles were gone. She took off her mask, and came over to the injured one. She took off his mask to see who had been hurt.
And there, before her very eyes, was her brother! The lead turtle had killed him! He wasn't moving, he wasn't breathing. She took it that he had died instantly and didn't suffer. But to her, her brother was her hero. Her only family left, and that was why she had had to join the Foot too.
But now, the girl vowed vengeance on the one who did this to him!
She went to the leader of the Foot, Karai, the new Shredder, for permission to bring this turtle in.
"Mistress Karai, I must speak to you about my brother." The girl bowed.
"What about your brother? I am busy." Karai said.
"He was killed tonight Mistress. By one of the turtles."
Now that got her attention. "Which turtle?"
"I don't know his name, but he wears the blue mask, and fights with katanas. I saw him do it!"
Karai looked angrily to the side. "Leonardo!"
"I want revenge on him for killing my brother!" The girl screamed at her.
Karai looked back at her. The girl truly did have the same evil mad with grief look in her eyes as she did for the turtles who had taken a family member away. But this young one only had it for Leonardo.
"Very well. I will have the men bring Leonardo in, and you can do as you please with him." Karai told her.
"Bring in his brothers too, but just lock them up. I will have my time with Leonardo, then let his own family see what's done to him! I already have thought up what I'm going to do to him!"