Hi Chibi Naga! I noticed that you made quite a few profile change proposals, and I'd like to help you out with the "quality" issues you're having. The reason your images have grainy thumbnails is because they are a .jpg filetype, meaning the image blurrs when it gets smaller, like it will on the wiki's articles.
Typically, we like to use .png filetypes, as they do not become grainy images when resized. Also, it is unlikely the proposals will be approved by administrators, as they are not the right size. The correct sizes for images are 400x300 (when cropped) and 222x250 (when resized). I hope that helps. :)