Teenage Mutant Ninja Turtles 2012

Face. He has calm, expressive sapphire-blue eyes—they sometimes reveal determination, sometimes a hint of weariness from the burden of responsibility. His features are neat and composed: he rarely allows himself to relax, even in his facial expressions.
Skin and shell. Leo has emerald-green skin, slightly darker than Michelangelo's but lighter than Raph's. His shell appears strong and durable—like armor he wears not only physically but also metaphorically.
Build. He's the average height among his brothers (slightly shorter than Donnie, but taller than Mikey), slim and trim—he exudes a sense of composure and readiness for action at a moment's notice.
Leo is the most serious of the brothers, but behind this stern exterior lies a teenager who desperately wants to be a worthy leader. He's a perfectionist: if something doesn't go according to plan, he blames himself first and foremost. At the same time, he genuinely cares for each of his brothers—even when he scolds them for their frivolity, he does so out of fear of losing one, not a desire to assert his authority.

His relationship with his brothers is not easy:
With Raphael, there is constant tension: Raph challenges his leadership, and Leo tries to maintain control, and these conflicts show how difficult it is for him to bear responsibility.
With Donatello, there is respect and mutual support: Leo trusts his intelligence and often seeks his support when he doesn’t know what step to take next.
With Michelangelo, it's a mixture of patience and irritation: Leo doesn't always understand Mikey's jokes, but he's the one who most often covers for his younger brother in battle.

Skin and shell. Raph has the darkest olive-green skin of any turtle, seemingly emphasizing his "difficult" nature. A distinctive lightning-shaped crack is visible on his plastron (belly shield)—a scar from his childhood.
Build. He's strong and stocky, not the tallest of the brothers, but the most powerful: he exudes a raw power ready to burst forth at any moment.
Face. Raf has an angular, "sharp" head shape, large, expressive green eyes, and an almost always intense gaze. His facial features seem designed for frowning.
Raphael is a pure choleric: abrupt, sarcastic, and always dissatisfied. He argues with Leonardo over leadership, teases Donnie about his "smart talk," and nags Michelangelo, even though deep down, he cares for him more than anyone else. His favorite line is something like, "Let's just smash this," because he hates long discussions.
Yet behind his rudeness lies a huge heart: Raf is willing to take the first step to protect his brothers. This is especially touching in his relationship with Mickey: he scolds the younger one for his frivolity, yet it is he who comes to his aid more often than anyone else. And next to the Mona Lisa, Raf becomes unexpectedly timid and awkward—as if all his rage has vanished.

He also has his weaknesses: he's terrified of insects, doesn't like flying, and even understands a little of the language of pigeons—a strange combination for such a brutal guy.

Appearance
Build: He's the tallest and slimmest of the brothers, quite thin—even Karai once called him "skinny."
Skin and shell. Olive-green skin, typical turtle shell—it remains an important part of the character's look, but doesn't interfere with acrobatics and combat.
Face: Donnie has a noticeable gap between his front teeth (diastema), large red-brown eyes, and a distinctive "egg-shaped" head.
Attributes: A purple mask—its long tails distinguish him from his brothers (only Raph's is longer). He has swamp-colored bandages on his arms and legs, plus brown elbow and knee pads, and white finger wraps.
Details. Overall, the look emphasizes its techie nature: practical, functional, and without unnecessary pretentiousness.

Donnie is a typical passionate teenage scientist: smart, meticulous, and sometimes overcomplicating simple things. He truly believes in the power of science and his own inventions, but he can also be nervous and irritable when something breaks or doesn't work. He's also a bit socially awkward, especially around April, with whom he has a crush—which often leaves him flustered and overly complex, confusing his brothers with scientific jargon.