Given her clear resemblance to Silver Spoon I can't believe I never knew about this pony before! My headcanons are going into overdrive. A relative? A parallel universe? Some kind of body fusion? A time-travelling reincarnation?

(Or, more likely, just a pegasus who happens to resemble her. But I can dream, dammit!)

clear resemblance to Silver Spoon

I never noticed before,but you are right they look like it might be sisters