Ну хвост ТК она точно носит, а вот насчет остального...
Basically TigerClaw and Alopex were kids and they went into a portal, then the Kraang mutated them, they made it back to Earth after a couple of months, but couldn't be around humans, so they both end up at a Circus, then at some point they became hired assassins, and suddenly Alopex turned on TigerClaw and tried to kill him, but only cut off his tail, She wears his tail as a belt on her waist apparently.