April O'Neil is an ally and friend to the Teenage Mutant Ninja Turtles in the eponymous 2012 CGI series. 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 become an official member of the Hamato Clan.

== Appearance == She's 16 years old (birth year c. 1996) and 5'1" (1.55 m) tall. April is a slim, pretty, and fair-skinned teenager with freckles on her face, ocean-blue eyes with long and thin eyelashes, and shoulder-length ginger hair kept in a small 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 yellow sports shirt, with the shirt sporting multiple white stripes and the number "5" printed on the front, which is also colored white, and it is worn over a mid-quarter-sleeved, navy-black shirt. She wore navy-black leggings under blue denim short-shorts with a noticeable patch on the right back pocket of her shorts, resembling Pixar's Luxo Jr. Ball: A round yellow patch with a blue outer ring and a red star in the middle. There also appear to be keys that are assumed to be her house keys. April also wore thick, calf-length white socks with two blue stripes around the top, large metal-like black boots, and dark brown wraps around both of her wrists, implying to be sports tape.

Since "New Girl in Town", her pajamas consist of a long-sleeved yellow button-up shirt with floral pants.

In "The Kraang Conspiracy", she is seen wearing a white long-sleeved button-up shirt with white pants when the Kraang were 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 suit over her normal outfit with a white belt, gauntlets, and boots. This appearance 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.

== Personality == April is a smart, strange, and stubborn 16-year-old tomboy with an indie rock vibe. April is also feisty and determined, and quite resourceful. She is fiercely loyal to her mutant friends, as seen in "Panic in the Sewers". When the Turtles are ready to give up, April volunteers to find out Shredder's plot. She is also somewhat reckless too despite her intelligence. She cares about her family, or what's left of it, above all else.

Any threat to her father is one that she takes very seriously, and when she finds out that the Turtles are accidentally responsible for his mutation, she becomes enraged and temporarily severs her ties with them. However, hearing Casey's story about losing a friend in a similar situation and agreeing with Donnie's earlier advice about not controlling everything, April realized her actions and behavior, as she felt remorse for pushing the turtles away for something that was an honest accident.

Unfortunately, April's guilt became worse when she was once again assaulted by Karai, as she realized that she not only put Casey in danger but also realized that he and Donnie were right about not controlling everything, even going to the point of desperately calling Donnie for help. After he and the others save her, they reconcile as April apologizes to the turtles for her actions and behavior, especially to Donnie.

She has grown to be hostile and slightly mentally unstable due to her weird obsession with the crystal the Aeons gave her. However, after the events of "Bat in the Belfry", April has begun to show signs of mental instability regarding her Aeon Crystal, becoming overly-possessive of it, and going into fits of rage whenever she has parted with it or someone tries to touch it, even using the Turtles' weapons against anyone she sees wearing it to get it back. But after seeing Donnie getting destroyed due to her being controlled by an elder Aeon, April immediately regrets her behavior and apologizes to the others for allowing her obsession over the crystal to destroy her friends and family.

== Trivia ==

• April's name comes from the Latin "aprīlis", meaning "of the month of the goddess, Venus". April's surname, O'Neil, is of Irish origin; derived from Irish Gaelic, it means "descendant of Niall" (the translation for Niall either being "Cloud" or "Champion"). Her surname implies that April has family roots in Ireland, making her ethnicity/nationality Irish-American.
• In Japanese, April's name would be 四月 (しがつ, shigatsu), meaning "the 4th Moon"; (moon = month and April is the 4th month) or 卯月 (うづき, uzuki), meaning "Moon of the Rabbit". In Katakana, April's name is spelt: アプリル (Apuriru).
• April is called "April-chan" by Mr. Murakami, whom she likewise addresses as "Murakami-san".
• As of the events of "Baxter's Gambit", April is now armed with a Tessen (lit. a "Iron Fan", better known as a Japanese war fan), a weapon that Splinter had one day hoped to give to his daughter, Miwa, whom April reminds him of. April will now be focusing her fighting style on the real-life Japanese martial art of Tessenjutsu. The tessen has a sharp edge when it spreads open, and can also be used as a throwing weapon.
• Before settling on the tessen, the weapons April went through are a Chigiriki (a staff with a chain), a Mace (a club), a pair of Kama (small scythes), and a Manriki (a length of chain with weights on both ends).
• April is revealed to have Chiroptophobia, a fear of bats, in "Fungus Humungous" most likely because of what happened in "The Mutation Situation".
• This is the first incarnation of April as a teenager.
• There is a Pixar Ball on the back of her pants.
• April's dad, Kirby O'Neil, prefers that April hang out with Donnie, but not with Casey.

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