Everybody Gets a Chocobo!

This is a good hack idea. Adding a portrait is possible, Novalia Spirit bank $C3 is all documented. However there is separated code for the party select screen, the status screen and the main menu. IIRC the ID for the portrait is fetched from the GFX set of the character ($1601) and there is a special case handling for imp status.

You could add more exception cases for Esper Terra as an example. RotDS required portraits for guest actors, so to solve this thing one and for all I made a table of 48 word pointers for all actors and based the portrait ID on actor ID ($1600) if character is above $10, to keep compatibility with FF3se and not move the vanilla portraits (actos $00-$0F).