Talk:Adventurer/@comment-14250-20190825214136/@comment-24751497-20190825220802

The English translation of the light novel states that she is the sixteenth platinum ranked adventurer:

"It was said that a single rookie had followed the guidance of a legendary sword, and at the end of their adventure had slain the demon king. That greenhorn—a young girl, as it happened—thus became the sixteenth Platinum-ranked adventurer in history."

- Volume 1, Chapter 10

Either something came up in the translations, or the anime just changed it on a whim.