Some TMNT stuff really isn't for little kids.
Teenage Mutant Ninja Turtles (March 1990 film)
In the first TMNT motion picture, April (played by Judith Hoag) was a television reporter (though she worked for Channel 3 news in this case) working for Charles "Chuck" Pennington, and did a series of stories on mysterious thefts in New York City whose culprits vanished without a trace. One night when leaving work, she was accosted by teenage thieves in league with the Foot Clan, but the Turtles appeared and saved her by knocking out and tying up the teens under the cover of darkness. In the aftermath April discovered and grabbed Raphael's lost sai, but Raphael soon followed her and took back the weapon and saved her again when she was attacked by a group of Foot Ninja in the subway and after first making a joke to them about being behind on her Sony payments, then trying to fight them off with her purse is knocked unconscious by one of them with one punch. Unsure what to do with her, he carried her unconscious form to their sewer lair. Though her fearful reaction upon seeing the Turtles and Splinter initially got the better of her, she eventually came to regard the Turtles as friends, and even allowed them to live in her apartment after the Foot Clan discovered and destroyed their sewer dwellings. Chuck fired April for a while. Also, Casey Jones develops a romantic interest in her but at first, she didn't feel the same for him. By the end of the film, she realizes she loves him and then kisses him.
Mirroring the Mirage Comics storyline, the Foot once again attacked the Turtles in the antique shop, prompting April, the Turtles (including a wounded Raphael), and Casey Jones to retreat to her family's farmhouse in Northampton, Massachusetts. She kept a journal documenting their forced sabbatical in addition to drawing sketches of the Turtles. During their respite, April also developed a kind of love-hate relationship with Casey Jones. She grew extremely close to the four brothers as well; Michelangelo, who initially confessed to having a crush on April, later addressed her as "Sis," indicating the role she had come to occupy in the Turtles' family.
Following the continuity from the previous films, it appears that she and Casey Jones are living and working together in a shipping firm, engaged in a relationship. It is she who finds Leonardo in Central America at the start of the film, having been in the area seeking an artifact for Max Winters. No mention is made of her past as a journalist, but it is instead implied that she has taken up archaeology as a career.
She has taken up martial arts training from Splinter, purchasing a yellow bodysuit with armor plating from Japan and becoming skilled in the use of katana, apparently leaving behind her past as a 'damsel in distress'. This is demonstrated as April and Karai fight it out while Casey, Splinter and the turtles battle the Foot in order to save Leonardo.