Just the search box would be tricky, e.g. when searching for “religious” all “non religious” would also show up. I was thinking of a filter for the list of characters e.g. or something similar.
OK I see. I’m not sure if the custom dropdown is the right approach then.
What about a more classic tagging system: there would be for each PC, NPC, group, element, etc. a new organizer field “tags” where organizers could assign zero, one or more tags of their choice (“religious”, “non religious”, “nationality1”, “nationality2”, etc). Each tag name would be clickable and when clicked it would show the tag page where would be listed all the PCs, NPCs, groups, elements, etc. tagged with this tag.
What do you think? If needed we can have a call when I’m back from vacations to discuss a solution.