Assuming you cannot already do this and I am not blind, would it be possible to make a search for any tag used for say Meiling and Touhou?
My thinking on this is there are a lot of tags I have no clue exist and might fit the image that someone later adds. It's just more or less for accuracy sake. With the links to the wiki and images one could look at the tag and add it when it applies to future images.
That being said would it be too much work for too little gain? It's IMO more of a minor issue but something that popped into my head.
One more thing, I forget if it was mentioned. But would personalized tag templates be possible? When tagging "series" aka Touhou you generally use xyz tags all the time but they don't always show in "related tags". Being able to set up your own template would be really handy to get the basic tags you will always use out of the way.
P.S.
Would there be a use to setting up a specific guidelines/template for creating pools? I think I mentioned this somewhere before but just thought about it again typing this post out.