A RWBY/MLP Crossover
Aka 'My little Penny:Friendship is Combat Ready!'

After walking out with a customized pony doll from a workshop in the City of Vale, Ruby Rose appears to enjoy having a pony in her possession, since she modeled it off her lost friend Penny. A little while afterwards, Ruby finds out that another user has be logging into her scroll's account and has been sending messages to an unknown address, though she cannot seem to clarify who the sender or the receiver are…until she catches the sender in the act.

Now, Ruby is even more surprised - and overjoyed when she learns about the true nature of her pony plushie, along with its mission, and its mistress. And along the way the Ruby will learn about the unknown truths regarding both the plushie's origins and her home-world's unrecorded history….

You called me friend…am I really your friend?