multiple persona
Similar to dual persona, except that there at least three personas of the same character involved.
Take note that the solo tag, or singular people counters (1boy, 1girl, 1other) should not be used with this tag.
If the instances of the character are identical, use clone instead.
Also see time paradox and multiple expressions.
Do not use the tag for reference sheet, variations and other depictions of the same character from different points of view (unless those are really different personae as in post #1173905).
