1. DO not randomly add categories to pages thinking that it needs to be there. Look at Aikatsu Wiki for reference. If those categories exist on the equivalent of those pages, then put it there. If not, don't.
2. DO not add categories to pages that you think are missing. Once again refer to the old wiki. If you think a category is missing, firstly think about why it was never put in there in the very first place. Secondly, ask an admin about it. It is a royal pain to go through 500 pages to undo one category storm that one person started.
2.5 Just because one person started adding a certain category DOES NOT MEAN YOU HAVE TO FOLLOW SUIT.
ASK AN ADMIN FIRST.
Thank you for your attention.