Tailsko is a female version of Miles "Tails" Prower created by a lot of DeviantArt users.
She first appears in the Noah Movie: Sailor Moon's Revenge as a cameo, and she made her first full appearence in Episode 126: AGK Has a Girlfriend (A.K.A. AGK Meets Tailsko & Emerald).
Tailsko is a 15-year old fox girl who loves her family (except Shawn). She tries hardly to forget an horrible event that traumatized her. She was bullied a lot at school due to her having two tails.
She first appeared in Episode 91 in an interview about Freddy Fazbear's Pizza. When Leopold listened to her story, he started to cry and felt bad for her.
It is revealed she also likes Leopold as she has seen him fighting Raynare after she set the school on fire.
She was one of EXE's victims, but he didn't kill her because he got confused. (Tailsko looks like Tails, so yeah -_-)