Donatello

Donatello is a main character in Teenage Mutant Ninja Turtles: City in Shambles.

Personality
Donatello is nerdy and socially awkward, compared to the other Turtles. He loves creating different gadgets for himself and his brothers, and toys around with new inventions and technology, which a large percentage are used in combat. Don will normally spend hours on end working in his lab after training, as he sees uses this as his quiet time, which is a major reason why he doesn't interact well with strangers.

Don is rather stoic and may appear to be emotionally distant and cold. He's not really one for spilling feelings, and only does this when he's either drunk, or pressed to do it. That being said, Don is a great listener and is often the one everyone goes to when they want to vent. He's also very good at giving advice.

Season One
Donatello is, of course, decked out in all of his favorite objects, including two specially-programmed iPhones, a radio, a headset, and a satchel filled with drones, spare batteries, smoke bombs, tracking chips, screws, nuts, and bolts. On the backside of his shell, he has a little antenna which acts as a device that allows Don to track his brother's phone locations, if god forbid someone were to get lost during a high-stake mission.

Post-Season One
Also included is Donnie's pride and joy: his high-tech, prosthetic arm which he constructed and set up all by himself. The arm is equipped with only the greatest and latest functionalities; it has a built-in GPS, is able to make calls/send messages, and is fireproof, all made of high-grade titanium.

Season One
Donatello is the skinniest, tallest, and least-muscular out of the Hamato boys. That being said, he is the most nimble and relies on his speed in combat more often than his strength. He has, of course, been called "weak" by others because they often see it as him running away instead of fighting, but could kick some ass if necessary.

Post-Season One
A particularly rough fight with Shredder leaves the Hamato boys bloodied and bruised, some in worse shape than others. The worst was Don who, after jumping in front of a wounded Mikey, took a particularly hard hit from Shredder. The villain's blades tore into Don's arm and although it wasn't enough to cut it clean off, it looked quite mangled and torn up; lucky for him, though, Don fell unconscious due to the extreme blood loss.

He remembered waking up on his lab table, the worried faces of his brothers, father, and friends all surrounding him. His arm was wrapped in a stained bandage, Splinter being the one who had attempted to clean the wound. It's when the bandage is removed that Donnie is able to see the true damage; his right bicep is completely scarred -and quite honestly looked like a rejected piece of meat- and his neck has some minor scarring on it as well. Don goes dead silent as he stares at his arm. He'd taken online nursing courses and knows full-well how high the risk of infection is right now, especially since he lives in a sewer. Was it worth the risk? Would his arm even be functional now? Don tells his friends and family that he's gonna be okay- no really, he'll be fine, he swears! Splinter is skeptical, but decides to leave his son to rest, and soon, everyone leaves the lab. Now was the time to patch himself up.

After a very long and excruciating three hours, Donnie managed to amputate his own arm. It was pretty messy, and he almost passed out a few times, but managed to remove a fair amount of the damaged arm. He fell asleep after that, and woke up to his family freaking out that Don now had no right arm. The next few weeks were very easy-going for Don, and he'd be lying if he said he didn't enjoy having everyone dote on him.

Splinter
Don greatly respects his father/sensei, and he often will go to Splinter for advice. However, they don't share any interests, which makes it tough for them to relate to one another.

Leonardo
Leo and Don are fraternal twins. As kids, they were close as could be and often hung out together, whether it be watching movies, playing board games, or practicing new forms/kicks with each other. As adults however, Leo became more serious and threw himself into his training, and unfortunately grew apart slightly, especially once Shredder, the Foot, and the Purple Dragons emerged and became primary threats. After Don's accident, Leo becomes protective over him.

Raphael
Raph likes to tease and poke fun of Donnie, and the geeky turtle really doesn't mind. Other than the occasional disagreement, the two brothers get along well, and Don enjoys lending an ear whenever Raph wants to rant about whatever's bothering him that day (ie: the fly buzzing around his room, Mikey's loud chewing, Leo, etc.).

Michelangelo
Mikey and Donnie are the closest out of the Hamato brothers, and love spending down time together. Whenever Don is working in his lab, he'll often look forward to Mikey inviting himself in and chilling out with him. Shockingly, Mikey is- for the most part- quiet, and the brothers will often share music together, vent to one another, or just bask in the comforting silence of each other's company.

April O'Neil
April is Don's best female friend, and one of the only people he feels like he can go to without being judged. They are each other's biggest supporters, and when April goes on patrol with the boys, she and Don often team up to take down the comically weak Foot Clan. Their friendship is very genuine, and they'd even go as far as to call each other platonic soulmates.

Casey Jones
Don's relationship with Casey is...complicated to say the least. They're friendly and civil towards one another, but Don's social awkwardness mixed with Casey's abrasiveness doesn't really work well together.

Mona Lisa
Since Mona wanted to go to school for animal sciences, she and Don get along well. They often talk about science-based topics together, and Don even encouraged her to continue schooling, albeit online since the schools most likely wouldn't allow a mutant at school.

Pigeon Pete
Truthfully, Donnie finds Pete kind of annoying and his energy rather draining. Despite this, he still respects Pete and admires his rather impressive spy skills.

LeatherHead
Donnie is honestly scared of LeatherHead, and it doesn't help that he's a seven-foot, ex-military, crocodile, whose prone to psychotic outbursts. It's a real shame too, because Don knows LeatherHead can be a kind, selfless person, but it's his short temper and sudden outbursts that really freak Don out and cause him to keep his distance.

Alopex
Don and Alopex get along shockingly well and as the series goes on, they grow closer and closer. At first, Alopex came off as egotistical, and Don seemed to be a snob because he rarely spoke. Once the Mighty Mutanimals and Turtles begin going on missions together, Don and Pex are pretty much forced to work together and learn more about each other. Other than April and Mikey, Don finds that he can trust Alopex with anything.

Mondo Gecko
Don likes Mondo and thinks he's a pretty funny guy, and admires him for his ability to pick himself back up and start fresh. Mondo seems to trust Don enough to spill his backstory, to which Don greatly empathized with.

Slash
Slash is a pretty tough guy to get along with as is, and Don views Slash as rude and brash, so he keeps his distance unless necessary.

Trivia

 * Donatello has taken an online course in nursing when he was around 16, as he's always had a fascination with anatomy. Ironically, he would later have to stitch and nurse himself back to health after he loses his right arm
 * Although he absolutely hates singing/dancing, he's surprisingly good at the former. Mikey has indeed caught Don singing to himself while he works multiple times
 * Donnie finds an old, abandoned ice cream truck and converts it into the Turtles own set of wheels
 * He doesn't let the others drive it very often unless absolutely necessary; Leo is a very slow and overly-cautious driver, Raph has terrible road-rage, and Mikey is a very distracted driver
 * He has selective heterochromia, meaning that while his eyes are primarily brown, his right eye has a small section of green in it