Sen to Chihiro no Kamikakushi, Haibane Renmei Recommendations
Both share distinct similarities in regards to their respective protagonists and plots. In both cases, a young girl is transported to a mysterious new world where she must learn to live and work within a community of strange creatures, guided by new-found friends. As time goes by, these girls learn strength and wisdom and question the world they live in and the authority that rules it. Similar plot themes are also notable in how both girls suffer the loss of their identity and memories, and come to recognise the pain in the life of a close friend, setting out to help them.
Slow paced...stuck in a strange new world...calming...and there is fantasy.