If I had to describe this anime in one word, that would be beautiful. It is both melancholy and sweet, providing a sense of peace in the tragic and chaotic world this anime is set in.
There are only a few characters besides the main and they appear a few times to provide context to the story that provides very little.
Ginko provides hope to those need it the most with no desire for anything in return. Due to his circumstances he decides to do this on his never ending journey, providing the peace to others he can never achieve himself. It truly is a beautifully tragic story.