Trixie’s time paradox clone from the alternate Chrysalis-ruled future, known as “Tricia” to differentiate between her and regular Trixie. She escaped to the past through the portal left behind by Twilight, so she’s actually about 7 years older than regular Trixie since she ended up in the “Rainbow Dash as a filly” time :D
 
Fun fact: Ever-paranoid of changelings she still wears her makeup and is the one who warned Canterlot of the “imminent threat” in A Canterlot Wedding :P
 
All of them together :D