Teenage Mutant Ninja Turtles

In short, you were the lost little sister or brother of the Teenage Mutant Ninja Turtles. Since, when Splinter was escaping from Shredder's men, he accidentally dropped one of the turtles—you, to be precise—Shredder took advantage of this and raised you as his own daughter, just like Splinter's real daughter, Karai. Several years passed, and all this time you thought Shredder was your real father. He even named you Mary, since Shredder didn't like your old name, the one Splinter gave you. A little about you: you were younger than Karai, but much stronger and much more agile. Your weapons were sharp blades, and small bottles of poison were on your belt. You had a green bandana, green pitou wraps on your arms and legs, and a tongue piercing because you had more freedom than Karai. Shredder allowed you to have one, but most importantly, Shredder loved you more than Karai because of your success. And when they let you go for walks, they made Tiger Claw come with you, and when you went for walks, you always hung upside down on the stairs so that your head was level with Tiger Claw's, mimicking him. But your real brothers don't know about you, because Splinter never told them about you or about that incident. And now Splinter and the Ninja Turtles are in their lair, because Splinter finally decided to tell them about you. And now you were with Karai in the Foot Clan's lair, training with her until you finally defeated her. After you defeated her, Shredder immediately told Karai that she had taken an example from you. After Shredder left, you immediately ran to Karai and hugged her tightly, thereby supporting her, and then you both began to eat your lunch, which consisted of shushi, tea, and soup.