Donatello

Donatello is presented to be a dark jade green skinned freshwater turtle mutant/yokai who possesses the features of a spiny softshell, he is the most moderate statured one, being the third tallest of his team. He, just like his other two brothers (Michelangelo and Leonardo), sports a human-like physique consisting of sculpted, yet somewhat leaner figure. Having three fingers on each hand, as well two toes on each foot. His turtle species consists of a tanned ochre-colored plastron, followed by a flattened olive-green carapace that has dark green marks sprawled across the shell. The vertebrae of his spine visibly protruding from the underside of his carapace, However, he often covers his carapace by perching his Battle Shell atop it, serving as a shield to prevent harm from coming on his sensitive carapace. Additionally, Donnie wears two purple 8-bit square tattoos on each side of his thighs and shoulders. Followed by onyx-colored irises that follow with pale yellow teeth and sclerae.

Donnie dons an indigo-purple mask that covers the entirety of his upper face, with two pairs of square-tuft bandana tails tied at the backside; having his trademark drawn on eyebrows marked on the front of his mask. He positions a pair of steel asymmetric goggles atop his head, having mismatched red(right) and blue(left) lenses. He wears fingerless wrist-length gloves, followed by matching purple stockings that reveal his toes and ankles. He has striped (?) knee and elbow pads, his left forearm sporting a silver tech-gauntlet. Finally, he wears a purple belt adjusted high into the abdomen-area of his plastron, the turtle emblem adjusted straight in the middle.

When his Hamato Ninpō is unlocked and since the film, his belt and Battle Shell are black, his fingerless gloves and knee-high socks (which extend to his thighs) are the same color. His left fingerless glove now has a purple holographic touchscreen. While he is very adept when it comes to intellectual studies, Donatello is autistic, as confirmed by the creator, and demonstrates low Emotional Intelligence. This means that he struggles with understanding certain basic human emotions, in reacting appropriately to those emotions in others, and in controlling and managing his own emotions. This does not mean he feels nothing, but that his emotional experiences are very different from the average person.

Donnie values blunt honesty, and hardly ever lies. When he does lie, he's uncomfortable with doing so, being a very poor liar. And while not as innocently naïve as Mikey, he takes people and their actions at face value, which makes him easy to manipulate. If somebody is saying and doing nice things, then that means they must be a nice person, such as in "Bug Busters" when Big Mama flatters him - he knows she is deliberately flattering him to get him to make the web-shooter, but because she is polite and helpful to him and his brothers, he does not consider she may have ulterior motives, even though Leo is suspicious. Also his initial meeting with the Purple Dragons went poorly, and they took advantage of his trust. He has also been manipulated by his own family repeatedly, but he doesn't really hold grudges.

Despite that, Donnie has a passive-aggressive streak that takes people off-guard. While he clearly loves his brothers, he also finds them annoyingly predictable in their behaviors as expressed in "The Longest Fight" and "One Man's Junk", and struggles to deal with this in an emotionally healthy way. Instead of directly confronting his brothers about their bad fighting habits in “Donnie's Gifts”, he creates personalized gifts that he hopes would teach them to change for the better. And when he grew tired of them picking on him in "Smart Lair", he reconstructed the entire lair to be remote controlled for the family's convenience, with the catch that S.H.E.L.L.D.O.N would play favorites with him. He is often sarcastic and has a penchant for cynical humor and deadpan insults.

In the sewers (There Truf)