Intended to be used inside of Template:AARInfobox.
Checks to see if the page linked is included in Category:Player Characters, if so, it tags them using Property:hasRunner as an involved runner. Otherwise, tags them with Property:SignificantNPC. This template can accept up to 20 entries. If anyone somehow for whatever reason needs more... First of all what the hell? And second of all... Just... Just ping the wiki department for help and we'll expand the template to accommodate more.