The characters are based entirely on this diagram

(nsfw:1.5),lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username, blurry,too many fingers, thick lips, oversized head,facing away,extra arms,extra hands,small breasts,loli,monochrome,zombie,extra eyes,weapon,hat,