You can create tags for character names and descriptions of items in the scan (i.e. blonde hair, wings, ponytail, etc).
When tagging character names, please include the character's first and last name. As you can search within a category when looking through tags, it's alright if two characters have the same name, you would still be able to find the character for the series you are looking for.
Please do not tag images with category names. The category names are already included in searching the images, so the tag would be redundant.