Tomoe Ame (2003 TV series)

Tomoe Ame is an anthropomorphic cat from the Usagi Yojimbo comics. She appears in the Usagi/TMNT crossover comic The Treaty, as well as in the 2003 episode The Real World, Part 1, where she is voiced by Rachael Lillis.

Trivia
In the beginning of The Real World, Part 1, Splinter is teaching Leonardo the Falling Rain swordplay style. This is the style Ame uses, which was founded by her father.