Hey, I created a font for my game PRTs for the lowrezjam 2016 (https://pixelpow.itch.io/prts).

Each letter is only 3x4px, so you can show two or even three rows in a dialog box.
I had to mix uppercase and lowercase to avoid letters looking the same in that resolution (such as H and M).

Here is the link to the font: https://www.dropbox.com/s/uuf92jp7dx42kbf/PRT_Font.zip?dl=0
You can use it or maybe it helps you  creating what you need :)