BR Violet Evergarden: Eternity and the Auto Memory Doll

Japanese anime directed by Haruka Fujita. When Isabella York (voice of Minako Kotobuki) is sent to an all-girls school she struggles to deal with being separated from her younger sister, Taylor Bartlett (Aoi Yûki). However, as Isabella develops a strong bond with her tutor, former war veteran Violet Evergarden (Yui Ishikawa), she is encouraged to express her feelings in a letter to be sent to her sister.