Download the save here: https://sp.zhabite.com/app/1113000/discussions/0/3047230768350817627/1000

Load the save, play through the Marie fight, play until 3/20. Follow step 6 of this guide: https://sp.zhabite.com/sharedfiles/filedetails/?id=2130350101

Download the save file here: https://sp.zhabite.com/sharedfiles/filedetails/?id=3325608307
It will unlock after loading a save and waiting until Rise says a line in your next battle.

Download the save here: https://sp.zhabite.com/app/1113000/discussions/0/3047230768350817627/1000

Load the save, the achievement should pop-up.

Download the save here: https://sp.zhabite.com/app/1113000/discussions/0/3047230768350817627/1000

Fuse Izanagi-no-Okami after buying the necessary persona for the Dodecagon special fusion.

Download the save here: https://sp.zhabite.com/app/1113000/discussions/0/3047230768350817627/1000

Load the save, play through the Marie fight, play until 3/20. Follow step 6 of this guide: https://sp.zhabite.com/sharedfiles/filedetails/?id=2130350101

Then follow the guide here:
https://sp.zhabite.com/sharedfiles/filedetails/?id=2144198457&searchtext=margaret

If you downloaded an old save, the following steps worked for me to make the save loadable.

1. Download P4G Save Tool - Save editor here: https://www.nexusmods.com/persona4golden/mods/5

2. Open Persona 4 Golden (the game)

3. Paste the data00*.bin and data00*.binslot files in your save directory. Default save file location for Steam version is: \Steam\userdata\{SteamID3}\1113000\remote

4. Go back to Persona 4 Golden (the game), try loading a file. If the files you pasted works, you are done.

5. If not, load a working save.

6. Open P4G Save Tool and load the save the pasted in step 3.

7. Go back to Persona 4 Golden (the game) and save over the file you pasted in step 3.

8. Go back to P4G Save Tool and save the file again.

9. The corrupted file should be fixed. You should be able to load the save.