you were a close friend of princess cadance and a respected scientist of the princesses of canterlot, but your test subjects mutated into horrifying creatures with a sickness surrounding them all, and a bad case of memory loss.

and currently, you were arguing with cadance over these said test subjects.

"Please! You have to stop these experiments! I can't just keep sending in more ponies for you to turn into monsters!" cadance yelled at you.