Doppelganger tag, redundant?

The wiki for doppelganger states:

• a remarkably similar double; a lookalike,
• an apparition or ghostly double of a living person; especially one that haunts such a person,
• the opposite side of a personality; an alter ego; an evil twin,
• a person who has the same name as another; an imposter, or
• a monster that takes the forms of people, usually after killing them.

I feel like all of these are better covered by other tags, like look-alike, name connection, and dark persona. Wouldn't it be preferable to nuke the tag after ensuring the correct tags are in its pics?

What about this part?

• a monster that takes the forms of people, usually after killing them.

Narberal Gamma, Doppelganger (Monster Girl Encyclopedia) & Doppel (Monster Musume) comes to mind.

Mavado said:

What about this part?

Narberal Gamma, Doppelganger (Monster Girl Encyclopedia) & Doppel (Monster Musume) comes to mind.

Doppel isn't actually a doppelganger, and none of those characters have physical traits indicative of being a doppelganger, and I'm not even sure what that would entail. Without visually identifiable physical traits, the tag is essentially just canon padding.

To me, the most useful a tag like this could be is for use on posts where the context makes it clear that one of the lookalikes/clones is some sort of impersonator. Any other use I can think of would just be canon tagging.