I had been given this pin as a gift and I love it for 2 thing. One being the game I like and having both characters be shown in one spot is pretty cool. And two being the fact that I have a pin similar to this but the lenticular doesn't look right so it looks like a smudged pin but not this pin
I'm pretty sure you're the one in the mirror.
This official Celeste pin features a lenticular effect that shows Madeline or Badeline in the mirror, depending on your perspective. It was designed by Jon Kay and Nina Matsumoto.