I believe you can just edit your character in the new game section and afterward, load your save, and it should stick, as odd as it may sound. Your character's .slic data is what gets edited and isn't the same as that character's saved game data. So no new games necessary, I believe.
You're welcome, glad I remembered it correctly.
I'm surprised we can't check it in game in the status page, but that's what the character edit is for, I guess. It's a bit annoying to have to exit out of the game and relaunch it just to check. A quit to title screen option would be nice or a way to check and or edit our custom characters in game. But that's all QoL. I'm sure it will come someday.