Now the name of this character in our MLP pen and paper rpg may be a little confusing to the English readers. The name Liar is not pronounced in a way that would make it sound like she was a liar. Moreover “Liar” turned out not to be her original name to begin with. Our characters encountered her for the first time in a kind of temple ruin (hence the S6E13 screenshot background) and while she may look very friendly she is a very badass magician and was unfortunately part of that shady organization we were struggling with. Things could have really gotten out of hand at that point (the much the more as he had a rather aggressive looking, sword wielding, armour whom we dubbed “Magnus” in her company) had it not been for the creative approach of our earthpony, Graystan. We met Liar again and later learned that her original name, from a past to which she probably doesn’t remember, was Limet.  
She is the elder sister of Shockfire who later joined our group.  
Here is another version of this image with the colors of her coat switched and a slightly larger horn.  
And here is one version without her coat and her Cutie Mark visible.