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I know this is a short answer but I've started to organize characters using Charahub. I think your wall-method may even be more advanced than that! Please don't worry about being 100% crazily cons...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/42003 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
I know this is a short answer but I've started to organize characters using [Charahub](https://charahub.com/characters). I think your wall-method may even be more advanced than that! Please don't worry about being 100% crazily consistent; I promise that the majority of your genealogy (and its mistakes) will not be a focal point to readers. It's more important to give emotional and psychologically development into the central characters (or families), and then just plunge right into the interwoven plot. Best of luck!