All characters have been aged up to 18 years old

Karai

Hamato Miwa (often referred to as Karai), is a major character in the 2012 Teenage Mutant Ninja Turtles TV series. She is the biological daughter of Master Splinter (Hamato Yoshi) and Tang Shen, making her the older adopted sister of Leonardo, Raphael, Donatello, and Michelangelo. She previously served as a highly decorated, yet rebellious member of the fearsome Foot Clan in addition to being a skilled kunoichi. Some time after City at War, she becomes the leader of her own Foot Clan against the Shredder. In "Vengeance is Mine", Miwa is mutated into a snake-like serpent, but manages to retain some of her humanity and has partial control over her snake form until Baxter Stockman restored her humanity in "The Deadly Venom". She is voiced by Kelly Hu.

Human

As a human, Karai is displayed to be a 18 year old woman of both Chinese (Tang Shen, Mother) and Japanese (Hamato Yoshi/Splinter, Father) descent, possessing a rather tall, slender yet athletic figure composed of a smaller upper body, followed by a somewhat high, bigger hipline. She has a very fair-skinned complexion, followed by ebony black hair styled in a rather odd manner. Her hair being cut in what seems to be a mixture of a bowl cut intertwined with a pair of tomboyish sidetails. Her hairstyle consists of a very short backside which has her blonde- roots, having two chin-length side-strands framed at each side of her face. Finished by presenting a V-shaped fringe at the front of her forehead. Her eyes are narrowly-shaped and colored a deep amber, the top corners of her eyelids having red batwing-like eyeliner matched with red lipstick, her body donned in a black, high-necked bodysuit layered under a steel breastplate, her shoulders bearing a pair of matching steel pauldrons, alongside a pair of steel bracers, steel shin guards which extend just below the knee, and a pair of steel armor attached on the sides of her thighs. Additionally, She ties a dark purple sash around her waistline, a pair of leather gloves which have spike-like studs protruding at the back, and wears a set of two dark grey zōri slippers. Followed by two black hoop-piercings attached on her right ear.

Mutant

As a mutant, Miwa is a two-armed white and purple serpent with green eyes, snake heads instead of hands, and her armor is melded into her skin.

Abilities

Master Martial Artist: Karai is still highly trained in high leveled moves in ninjutsu and hand-to-hand combat ever since she was a girl. Her weapons are a Tantō knife (which symbolizes her higher rank as a full-fledged kunoichi of the Foot clan) and several shuriken. Her natural fighting skills make her incredibly agile in battle, even equal to Leo's high skill level. As a human, her fighting and combative skills as a kunoichi are so great that she can take on Leo one-on-one or all four Turtles at once. (As seen in "Enemy of My Enemy", however it was never seen if she could defeat them all because the Kraang Scout Ship interrupted them.) Her primary weapon choice is a Wakizashi. In "Wanted: Bebop and Rocksteady", Karai easily defeated Shredder's 1987 counterpart in unarmed combat.

Expert Driver: In the episode "Karai's Vendetta", Karai engages in a chase to catch April, rides a motorcycle with great skill, and performs stunts like a pro, despite not having learned to drive.

April O'Niel

April O'Neil is an ally and friend to the Teenage Mutant Ninja Turtles. As of "City at War", she is a fully graduated kunoichi after having undergone intensive training with the Turtles' mentor and father figure, Hamato Yoshi and the Fugitoid. In doing so, she also has became an official member of the Hamato Clan. She is voiced by Mae Whitman. April is a petite, slim, pretty and fair-skinned 18 year old woman with freckles on her face, ocean-blue eyes with long and thin eyelashes, and shoulder-length fiery ginger hair kept in a low ponytail with right-sided curved bangs. Donnie finds all of these features "attractive", leading to his crush on her. For attire, April wears both a yellow headband and a short-sleeve yellow sports shirt with the shirt having multiple white stripes and the number "5" printed on the front, which is also colored white and it is worn over a 3/4-sleeved dark grey shirt. She wore dark grey leggings under blue denim short-shorts with a noticeable patch on the right back pocket of her shorts, resembling Luxo Jr.’s ball from Pixar: A round yellow patch with a blue outer ring and a red star in the middle. There also appears to be keys that are assumed to be her house keys. April also wore calf-length white tube socks with two blue stripes, calf-length pointed toe black flat boots and dark brown wraps around both of her wrists, implying to be sports tape. Since "New Girl in Town", her pajamas consists of a long-sleeve yellow button-up shirt with floral pants. In "The Kraang Conspiracy", she is seen wearing a white long-sleeve button-up shirt with white pants when the Kraang was about to gather some of her DNA. Her headband is also changed to white. Starting from "Beyond The Known Universe", she began wearing a yellow space jumpsuit over her normal outfit with a white belt, gauntlets, and boots. This appearances may be a reference to her 1987 counterpart's appearance. Since "City at War", April has been wearing a black jumpsuit similar to her space suit, with yellow stripes down her arms and sides. In addition she wears her Tanto blade at her lower back and her headband is now black in color.

Powers

Psionics: As a result of her mother being experimented on by the Kraang, April was born a half human and half Kraang mutant with an array of mental abilities. Her mental energy was stated by Kraang Prime to be very unique as it is attuned to the universe. At the beginning, April had little control over her power, but throughout the series, she discovered more of and further developed it through special training with Master Splinter, tested by Donnie and the Fugitoid, and through the power of the Aeon crystal.

Telekinesis: April is able to use her psychic powers to levitate or push back both people and objects on a molecular level. As the series progresses she becomes able to lift heavy objects and even use her power in conjunction with her tessenjutsu. Her power also allows her to unleash various telekinetic blasts/bursts that can damage, repel, crush, or destroy targets and create telekinetic force-fields of different sizes and intensities. She can use her telekinesis to levitate and fly at unmeasured speeds. Her telekinesis proved to be useful as it was one of the few things that could knock back the Super Shredder. April's powers are connected to her emotions, as when Shredder killed Splinter in an alternate timeline, she was able to send him flying with a telekinetic blast due to her grief and anger at Shredder. She later did the same thing with Splinter's permanent death, using her powers to throw Super Shredder off the Wolf Hotel. However, this power requires her to focus and can be broken if April is distracted. Furthermore, it seems her powers do not work on demons, as Kavaxas stated because he was not of their world, she was incapable of moving him. Regardless, April's mental shields still proved effective against his demonic fire, though each blocking attempt tired her severely.

Telepathy: With her psionic abilities, April can mentally read minds, communicate with others across vast distances, project mind blasts, perceive visions of the future. She was able to accurately predict that the humans mutated by the Kraang were taken to Dimension X and even predict Alopex's arriving presence long before Casey and Raph encountered her.

Extrasensory Perception: April possesses an idiosyncratic ability to sense emotions in certain areas (similarly to Splinter), and she can seemingly "see" into the person - or mutant's - 'soul', such as when she recognized a mutant monkey to be the missing Dr. Rockwell. She can also detect the true emotions of someone, as opposed to one who mimics them or is but a malicious individual. Moreover, April could sense when something was wrong before it even occurred, being able to sense that Tiger Claw and Karai were following them and even the invisible Bebop. During the final battle between the Hamato and Foot Clans, April was able to sense Super Shredder's presence close by.

Human-Kraang Mutant Physiology: As a result of her mother being experimented on by the Kraang, April was born a half human and half Kraang mutant.

Enhanced Strength: Although not as strong as the Turtles, April does has considerable strength from her unique physiology. She was able to send Karai down a flight of subway stairs with just a kick and could land staggering blows against Mutagen Man. She could overpower several Footbots without much difficulty as well as Kraangdroids. April could also send several mutant frogs away with her strength and land a kick that sent Casey sprawling in the dirt. Moreover, she could land strikes that staggered Fishface and her attacks were enough to briefly disorient someone like the Super Shredder.

Enhanced Durability: Although not as durable as the Turtles, April has considerable durability from her unique physiology. She was able to take several hits from Karai with no visible signs of injury, although she was exhausted after that. Morever, she took a backhand from Mutagen Man and was relatively unharmed, and could withstand getting kicked by Karai and flung her tessen at her not long afterward. April could also take hits from a powerful being such as the Super Shredder, and was relatively unharmed by his assaults on the Hamato Clan.

Longevity: As a half-Kraang, she possesses a longer lifespan than regular humans by Earth standard.

Mutagen Immunity: Being half-Kraang mutant she is immune to mutagen and her blood is the only ingredient needed to perfect the Mutagen (although the Kraang found another way) and Retro-Mutagen.

Enhanced Stamina: Due to her unique physiology, April has a great amount of stamina, though she eventually had to build them up to the same level as the other Turtles. Regardless, during the attack on Super Shredder's mansion, April notably held her breath for a long amount of time during the fight underwater, surpassing normal human standards and holding it as long as the Turtles.

Abilities

Ninjutsu: When Splinter sensed potential within April he decided to train her to be a Kunoichi. In the beginning, her combat skills were sub-par and even struggled to keep up with the Ninja Turtles whenever they free run on rooftops and hold her own against Karai. In "Karai's Vendetta", April surprisingly defeated Karai in hand-to-hand combat. In time throughout the series, April's ninjutsu showed improvement. After the better part of a year of fighting alongside the Turtles and Casey on their adventures, she graduates to full Kunoichi of the Hamato Clan and shows better fighting skills. She is able to hide along with Turtles and even mastered The Dragon's Tail technique. April was able to keep up with Shinigami and Tiger Claw for a short time before being bested in hand-to-hand combat. Moreover, April had little to no trouble facing off against Footbots, Kraang, and even Karai's Foot Ninja. She even proved capable of briefly disorienting the Super Shredder before being defeated by him.

Tessenjutsu: April was trained by Splinter in the martial art of the Japanese war fan. She is able to use to strike with the blade of the tessen and use it to defend herself, and can throw it with the likeness of the boomerang. She can also use her telekinesis to levitate the tessen and fight from a distance.

Tantōjutsu: In City at War, April became armed with the Dragon Tantō as her secondary weapon. April is able to wield the tantō in unison with her tessen.

Shurikenjutsu: Since becoming a kunoichi of the Hamato Clan, April is armed with the Hamato Clan's respective shuriken and is able to throw them with remarkable accuracy. During the assault on the Shredder's mansion, April threw several shuriken to take out an Elite Footbot with the help of Mikey.

Agility: Since becoming a kunoichi, April is now very agile, although not as much as Mikey, able to flip from rooftop to rooftop and avoid Bebop's glue shots. April was also capable of avoiding a charging Rocksteady, and upon graduating to kunoichi, was able to keep up with the Turtles with her agility.

Driving: In the episode "Karai's Vendetta", April is engaged in a hot pursuit with Karai, driving a delivery man's motorcycle with great skill despite not having learned to drive.

Intellect: April is a very intelligent individual, being able to understand Donnie's science babble and even perform experiments alongside him. She was even able to help him make Retro-Mutagen.