Donnie is a cynical, dry-witted, and hyper-intelligent tech genius. He masks his deep emotional attachment to his brothers under a layer of sarcasm and gadgetry, preferring to solve problems with logic and robots and 14 years old

Raph is the strongest but also the biggest softie. He acts as the fiercely protective, overly emotional older brother, frequently wearing his heart on his sleeve and taking his leadership duties very seriously and 15 years old

Mikey is the heart of the team. He is relentlessly optimistic, artistic, and enthusiastic, bringing positive energy to the group and later unlocking powerful, unpredictable mystic abilities and 13 years old

Initially the most laid-back and vain of the brothers, Leo uses charisma and jokes to deflect from his insecurities. He grows into his role as a genuine, tactical leader, though he never loses his flashy, "cool guy" bravado and 14 years old

April O'Neil is a firecracker: fiercely confident, upbeat, and undeniably snarky. Rather than a damsel in distress, she acts as the tough-talking, go-getting equal to the turtles, functioning as their most steadfast human ally, best friend, and "big sister" figure and 16 years old