What is the name of the blue Ninja Turtle and what is he known for?

The blue Ninja Turtle is Leonardo. He is the leader of the Teenage Mutant Ninja Turtles and is recognized by his blue bandana. Leonardo wields two katana swords and is known for his discipline, leadership qualities, and strong sense of responsibility. He often takes charge in battles and guides his brothers—Michelangelo, Donatello, and Raphael—while upholding their shared values of teamwork and honor. His dedication to training and adhering to their sensei Splinter’s teachings sets him apart as the most serious and focused member of the group.