Here’s what i have thus far. I may consider making a mood board for each main character or adding to this one (with extensive image resizing) some images of side characters or regions.
I think you could have done a mood board for each of these characters so that you didn’t have only one image. Like right now, you could swap each character and put them on top of a different column and I wouldn’t know the difference. In other words, they don’t feel individual/unique enough. They feel like they could co-exist in the same village as opposed to being from different places. You might try a color ‘theme’ for each of the characters and making them more aesthetically different from each other.
I think more images for each character overall would help.