Same issue here, I took some time to realize it so I don't have older saves before this point
Maybe with changing some variable ? idk
Yes, you can give it to yourself editing the SWITCHES, NOT the variables, using the RPGM Save Editor available on this site,
https://f95zone.to/threads/rpg-maker-save-editors.51/ the latest version is something like 0.6.9, I think only 0.6.7 and newer will work with this game. You can NOT do it with the online save game editors. It would be easier AND SAFER, to add item #998 = TF Value Manipulator -- Also Manipulates Acceptance. It's a debugging tool that isn't added to the game except through save hacks. You can give yourself any and all transformations using that.
The SWITCH number is: 28 Hair ornamented. However, setting switches or variables can and probably will break the game.
ALSO, the saves are so large and so complex, the save editors take forever to process all the data, so be prepared for a five or ten minute wait as they load your save file. Well, it SEEMS that long.
I just used the latest editor available here, RpgMakerSaveEdit 0.6.10. It's on the last page there I believe. Post #240. It took almost five full minutes to load my save.
There were a lot of item additions, as well as item changes. The changes looked like they tried rather manfully ... or womanfully, to keep from breaking the saves, with how they left the old items and item numbers in, but there were tons of changes to the switches and variables, which would HAVE to break the old saves.
This is, BY FAR, the safest save editor available, yet even it can break your saves, so make a copy before editing! At least that way, you'll have a save that works.
It will only work on RPGM save files that are in the directory tree for the game. If the game saves in a directory other than the game directory, you have to move a copy of the save to the game directory, BEFORE you try to edit it. Then, after editing, you MUST copy the save file to the save directory, wherever that may be. It is dependent on the system file, weapons file, item file etc for those item, switch and variable numbers.