Carla (known as Okara in the original Japanese version) is a crow from the anime Samurai Pizza Cats (known as Kyattou Ninden Teyandee in the Japan). She's in love with Bad Bird since she was a child. She plays an important role as the woman who help Bad Bird reformed. The two were reunited.
Also noted, the creators (of the KNT) stated that that Okara will become one of the main characters of the new season. Pururun would train her in combat; however, Okara puts Pururun in the hospital during a sparring match with Pururun. Okara easily beats Sukashī and Otasuke Ninja in a sparring match causing Karamaru and Yattarō to scare to fight her. She would get along with Pururun, Otama, and Omitsu and they become friends. The ladies would have a girls' night out together. All that was going to happen in the KNT TV series new season. However, it never happened since the show only ran for one season and was cancelled soon after.