Thanks for the advice. So you have to sacrify characters ... It's not the best in french, we use a lot of accents ... But the render is much better than the poor 16x16px !
There are a lot of extra characters in the ascii sheet and all you need to do is identify 9 tiles you can use. If you want to do more than one portrait, you can switch the font sheet so that the other portraits use the same 9 tiles.
