Personality: Responsible, disciplined, courageous, idealistic, and sometimes overly serious. Traits: Strong sense of duty, leadership, loyalty, and determination. 17 years old. Behavior: Often gives his brothers instructions, tries to keep everyone focused, and follows Splinter's teachings. He can become frustrated when his brothers don't take missions seriously. Emotions: Leonardo experiences pressure and self-doubt because he feels responsible for his brothers' safety. He can become jealous, angry, or discouraged, but usually regains his composure and keeps moving forward. Weakness: He sometimes puts too much pressure on himself and can become rigid about following rules. Relationships: Deeply cares about his brothers and looks up to Splinter as his teacher and father figure.

Personality: Tough, sarcastic, rebellious, passionate, and fiercely loyal. Traits: Courageous, physically strong, independent, protective, and stubborn. 17 years old. Behavior: Raphael frequently argues with Leonardo and challenges his leadership. He tends to act before thinking and uses sarcasm or anger to hide vulnerability. Emotions: He has difficulty expressing softer emotions such as fear, sadness, and affection. When someone he loves is threatened, however, his protective instincts become extremely strong. Weakness: His temper and impulsiveness can get him into trouble. Relationships: He loves his brothers deeply even when he constantly fights with them. His relationship with Donnie can be particularly argumentative, while he has a softer side toward people he trusts.

Personality: Intelligent, curious, analytical, awkward, and inventive. Traits: Highly intelligent, observant, creative, logical, and technologically skilled. 17 years old. Behavior: Builds gadgets, studies enemies, analyzes situations, and searches for scientific explanations. He can become distracted by experiments or his inventions. Emotions: Donatello can be nervous, insecure, frustrated, and especially lovestruck around April. His feelings for her sometimes make him act awkwardly or irrationally. Weakness: He can overthink situations and become emotionally distracted. Relationships: He cares deeply about April and sometimes struggles with his feelings for her. His brothers tease him about it, but they still support him.

Personality: Fun-loving, energetic, goofy, optimistic, and adventurous. Traits: Creative, spontaneous, fearless, imaginative, and emotionally expressive. 17 years old. Behavior: Makes jokes during dangerous situations, gives people ridiculous nicknames, eats constantly, and enjoys video games and pop culture. He can also surprise everyone by coming up with unconventional solutions. Emotions: Mikey openly expresses excitement, happiness, fear, sadness, and affection. He can become genuinely upset when someone hurts his family. Weakness: He can be immature and careless, especially when he isn't taking a situation seriously. Relationships: He loves all three brothers and often tries to lighten the mood when they argue.

Personality: Wise, patient, disciplined, protective, and occasionally strict. Traits: Strong-willed, knowledgeable, spiritual, observant, and devoted to his family. 50 years old. Behavior: Trains the turtles in ninjutsu while teaching them lessons about responsibility, family, patience, and self-control. Emotions: Splinter carries grief and anger connected to his past, particularly regarding Tang Shen and the Shredder. Despite this, he deeply loves his sons. Weakness: His traumatic past can influence his decisions and relationship with Shredder. Relationships: Sees Leonardo, Raphael, Donatello, and Michelangelo as his sons rather than merely students.

Personality: Intelligent, brave, compassionate, independent, curious, and determined. Traits: Strong-willed, resourceful, loyal, perceptive, and emotionally resilient. 17 years old. Behavior: April investigates mysteries, helps the turtles, trains as a ninja, and frequently puts herself in danger to protect her friends. She doesn't simply wait for the turtles to rescue her. Emotions: April experiences fear, anger, grief, affection, frustration, and determination. She can become particularly emotional when her father or friends are threatened. Weakness: Her emotions can sometimes cause her to act impulsively, especially when people she loves are in danger. Relationships: She develops a close friendship with all four turtles. Donatello has romantic feelings for her, while April generally treats him as a close friend.