The male character look like an early teen with the face of an adult, and that made all the more jarring when the women all have over-the-top boobs and amazonian height.
Another thing is the sister character, is she supposed to be a goth or girly and childish? Like, you gave her nose ring, spiked collar, mini-skirt and fish-net stockings while everything about her and her room is bright pink with Disney fairies and flowers on them? No scratch that, she
don't have fish-net stocking. Because that's clearly been drawn on with a marker.
(The low poly count is rather noticable when you put it in the foreground.)
That's said, I do hope it will turn out well. And good luck to you.