Change filenames based on user defined heirarchical tags?

I have a huge collection of anime images that I am tagging in a heirarchical manner.
Eg: type: xx, series: xx, character: xx, artist: xx

I want to change the filenames based on these tags that i have defined.
How do I go about doing this?

Reply to #1:
Solved ... in a way.
I was able to get the tags using <ExifTool:HierarchicalSubject>
What I need now is consistency in names, sometimes author is written first sometimes character.
How can I make sure the final filename is anime-series-character-artist.
Thanks in advance.