As promised: the save. Import using the Character Exporter over another character slot (be sure to copy over character data). Using a GC ID of 0 will not let your GC be sent/viewed, although no name can be fun (you're not announced entering/exiting online/local rooms or for actions like carting/etc. on a quest) but will likely get you kicked for hacking if the host cares.
Also note that while the Arena quests have been completed at S rank, the earring rewards have already been picked up (and were deleted with the rest of the equipment). Just manually add them if you need them after importing the rest of your armor/weapons.
I did hide a tiny 'marker' on the guild card. If you find it please leave it. I'm just curious to see if I bump into anyone using my save