If it hadn’t have been for the fact that she had to pass the portal to get home, she probably would’ve never heard the girl come through the portal. Peaking over, she heard the girl talking and asking herself where she was. Sunset took that as her cue to speak up. “You’re at Canterlot High. Umm…. Who are you?”
Fionna gets up easily enough, she doesn’t even seem wobbly, “My name is Fionna. Um, why are you Yellow?” She looks around at the rainbow colored people, “Everyone here is the same colors as those ponies in the world I just left.”
Sunset was stunned silly. “Wait, you just can from Equestria?” She asked. “Are you not from there?”
Fionna cleans some grass from her skirt, “Nope. I come from a place called Aaa. My name is Fionna.” She smiles and extends her hand to the strange yellow girl.
“I’m Sunset Shimmer.” She said, taking the girls hand. “So… How did you get here exactly?” She asked.
Fionna sighs and sits on the grass next to the statue, leaning against one of the corners, “Well, I was minding my own business, on my way home from another adventure, when suddenly this hole appears in the middle of the sky and I get sucked through. I land in a castle made out of crystals, and there is this pink unicorn with a purple mane there. She says she didn’t mean to bring me there, but then I notice I had hooves, not hands. I kinda panicked and ran She chased me until I came across another pink pony with a cannon. I dodged the cannon and ended up in this room with a mirror. I slipped on the slick floor and fell through to here.”
Fionna smiles to Sunset, “But at least the first person I met here was nice to me.”
Sunset let out ‘snerk’ as she said, “Ok, first you probably shouldn’t have panicked as much as you did, but I don’t blame you. I panicked to when I first came here and found out I didn’t have hooves anymore since I’m from that world. As for the canon, it’s nothing to worry about. Pinkie calls it her "Party Cannon”.