BVP

BVP is an Atlus format that contains BMD messages. Unlike BF, this format is only used for Navigator Character text, which appears in an overlay on-screen during active gameplay, like in battle or dungeon crawling. Currently, it's possible to convert BVP to an editable format and back.

P3fontdec
A tool made by RikuKH3 for extracting the bitmap from a FNT file was made available here. However, his tool for successfully re-importing a modified bitmap has never been released to the public.