are these templates for creating our own characters? or something else?
These are size grid templates for anything in the game that conforms to 48x48 (sv_actors, chars, autotiles and etc.) and 32x32 (mostly icons). I use them as a backdrop mostly for creating/redo-ing alot of the icons and tiles i used for VX Ace. the grey/black borders of the 48x48 grid is basically where the edge cuts off.