April O'Neil is a female human character from the Teenage Mutant Ninja Turtles media franchise. While portrayals vary, she usually is a compassionate, idealistic woman who collaborates with the turtle protagonists in their missions. The four ninjas (Donatello, Leonardo, Michelangelo, and Raphael) in turn view her as a close friend.

More recently, media has O'Neil starting out as an assistant of Baxter Stockman. When she discovered that Baxter was using his Mousers to burrow into bank vaults and steal from them, she attempted to flee Baxter's workshop and found herself in the sewers running for her life, with several Mousers in pursuit. Three of the Turtles happened to come across her and save her and brought back to their lair, where she would meet Splinter and find out about their origin. With her new friends, she returned to Baxter's hideout and defeated him.

As the series went on, she became a closer friend to the Turtles and their link to the outside world. She also decided to reopen her father's antique store 'Second Time Around'. During the Shredder's sudden return (What Goes Around... Comes Around!/Silent Partner/Return to New York story arcs) April, the Turtles and their new friend Casey Jones had to escape to Casey's farm house in Northampton Massachusetts where she later had dreams about the Foot Clan's attack. During these events she would know Casey better and in time take a liking to him. April would live with her sister Robyn O'Neil for a while during the events of City at War and find out their father died. Looking for a new place to live, she just happened to find the apartment Casey was living in. Eventually she'd marry Casey and they'd raise his adopted daughter Shadow Jones.

See also:

• Teenage_Mutant_Ninja_Turtles
• Baxter_Stockman
• Donatello_(TMNT)
• Leonardo_(TMNT)
• Michelangelo_(TMNT)
• Raphael_(TMNT)
• Shredder
• Splinter