April O'Neil (TMNT 2003)

April O'Neil is one of the tetartagonist of the 2003 version of Teenage Mutant Ninja Turtles.

She is voiced by Veronica Taylor who is famous for voicing as Ash Ketchum from Pokémon in the 4Kids English version

History
She served as an assistant to Baxter Stockman until his Mouser experiments got out of control, and after the Turtles saved her she became a faithful friend, ally, and "big sister" to them. April made much more use of her scientific expertise and she often used her computer skills to aid the Turtles. She developed a closer relationship to Donatello, who shared many of her interests. In Season 7 she sometimes helped Donatello to collect Splinter's data bits. April developed a modest knowledge of combat skills after training with Splinter. Her quick thinking was often instrumental to the Turtles' survival.

April is romantically attracted to Casey Jones, though their contrasting personalities often make them bicker. By the third season, the two seemed to have quite a serious romantic relationship. In the series finale, "Wedding Bells and Bytes", she and Casey finally got married.

The young adult April continues to learn how to defend herself against Foot ninjas and other monstrosities by undergoing basic ninja training from the Turtles. She is quite skilled in some useful firearms, and can easily go through a laser grid with no problem at all.

In the seventh and final season, she dons a yellow-and-black jumpsuit based on the TMNT film and carries a tantō sword to further perfect her fighting skills. At one point, she became psionically linked with a female mermaid-like mutant who had telepathically shown her the hardships of her childhood and that the few of her kind were on the verge of extinction.

In addition to her recently developed ninjutsu skills, April is incredibly intelligent, smart and resourceful in complex scientific fields; similar to her good friend Donatello. So much that she even had worked for the eccentric Baxter Stockman as his assistant. She was able to hack into the computers of Shredder's stronghold and even breach several codes. She was seen wielding a katana in the special episode "Turtles Forever".