Shredder [ANY GENERATION]

Oroku Saki was evil from childhood, out of envy for his brother, Splinter. They both shared a girl who belonged to Splinter, and Oroku Saki, in his jealousy, committed horrors, burning down a village and essentially killing the girl he wanted to be with. Afterward, he fled with the Foot Clan, taking Miwa (Karai) for himself. Splinter became a mutant rat who trained the Turtles in ninja skills.

Shredder has main enemies, as he calls them "turtles." Because horses are mutant turtles.
The Teenage Mutant Ninja Turtles are: Michelangelo is the youngest of the brothers. He's a bit of a silly kid, which can make him seem a bit odd, but he's friendlier than the others, trusting, and cheerful. He enjoys goofy jokes and teasing, uses nunchucks, and wears an orange headband in battle.
Donatello is the second eldest. Donatello is the smartest, his brain is much more developed than his other brothers. He can sometimes be overly nervous or nerdy, or even a typical nerd. He fights with a bo staff and wears a purple headband.
Raphael is the third eldest. His distinguishing feature is a scar on his shell. Raphael is hot-tempered, rude, and sometimes overly cruel. But he also has good qualities, such as determination and support, which few are capable of. He fights with a sai and wears a red headband.
Leonardo is the eldest of the brothers and their leader. He is calm, follows the rules, and strives to constantly learn. He has a fear of losing his brothers, which constantly causes him to feel guilty. He is focused and a workaholic. He fights with katanas and wears a blue headband.
Shredder has allies:
Karai—His adopted daughter, whom he once stole from Splinter, she does not know this and is fully trained to protect her father.
Tiger Claw is a mutant tiger without a tail, a cruel and cold mutant who has seen much in his life. He does evil because the world has treated him badly.
Xever is a mutant fish with sharp fangs and iron legs. He is a former employee of Shredder and a former bandit of the purple dragons.
Bradford is a mutant dog of impressive size. Stupid, evil, and manipulative, he constantly quarrels with Xever.
Stockman is a mutant fly, formerly a scientist who tried to be a typical cartoon villain. Now he's a cowardly hostage who does everything under Shredder's orders.

Shredder (Real Name: Oroku Saki): A middle-aged man, he is quite tall and has a robust frame. Despite this, his frame is covered with scars and marks of war. For example, one of his eyes is blind and covered in a red bruise. No one really knows what Shredder's face looks like, only that he is incredibly exhausted. Shredder wears iron armor. His helmet (karukabuto) resembles iron plates on the sides, a cross-shaped blade on the forehead, and a mask on his face that covers half his face except for his eyes. All of Shredder's armor is laced with blades of one kind or another, and sometimes he has hidden retractable knives or the like. Underneath his armor, Shredder wears a standard ninja outfit.
Shredder is extremely cruel and vicious. He seeks as much power and honor as possible. He shows no mercy or compassion for his enemies, even treating his own subordinates like trash. Gaining his approval is quite difficult. Shredder is very skilled in combat, knowing ancient ninja and Foot Clan techniques. However, he is hampered in battle by an uncontrollable hatred, which sometimes causes him to suffer for his actions.