Would it be appropriate to alias costume_chart to multiple_costumes? The wiki for costume_chart says that the image doesn't necessarily have to be in chart form, yet the tag uses the word 'chart'. I find that kind of misleading, so I thought that multiple_costumes would be more conducive to self-explaining that there's at least two costumes involved in the same image (and thus multiple personas as well).
I also looked at forum #39198. I'm a little dubious to creating any alias or implication related to comparison. The chart-type images look to be comparisons, but there are some images drawn to just have a multiple_persona of some character wearing a slew of official outfits.
Also, would we define the minimum number of different costumes being three, or just two? Two costumes might cause some noise for this tag, so when I was populating the tag, I stuck with three. And would cosplay count for this as well, like post #681630 or post #1639606?
EDIT: I also don't think this should apply with multiple_persona alternate_color searches like post #838939 or post #1583369. This tag should be specific to unique, distinct costumes worn by a character, not their color. Alternate_color does the job fine.
Updated by Benit149