The question Do we really need this many generic character related tags? was posted some months ago, and the top answer (+15/-2) says:
We don't need any of these tags. They're all meta-tags that add very little info to the questions they're used on. They can't be used by themselves, really.
These tags should be deleted.
Evidently community consensus is that character-based topics in SFF such as character-development or character-similarity aren't worth their own tags on SFF.SE. Well, OK, but between them these five tags are used on a total of 691 questions currently, and that would be an awful lot of editing. There's no one tag which most of those 691 questions are in, not even story-identification, which would have eased the process by allowing a moderator to merge the character-related tags into that one tag.
So what should we do?