Angles of Death or Violet Evergarden. Both animes are character development driven. The characters show actual growth from where they started, the animation styles are unique and pleasing to the eye, and they are both emotional, especially the endings. An odd thing that the two have in common is that the main characters both have strong opinions on their idealization of 'God', the person that tells them what to do gives them something to work towards, and believes them. By the end, the characters come to peace, somewhat at least, that they have moved on from such a mindset. Very bittersweet and touching. Highly recommend both of them.
