BUR #52430 has been approved by @evazion.
deprecate amane_suzuha_(chat_noir)
deprecate akiha_rumiho_(chat_noir)
Chat_noir_costume_(steins;gate) is already a tag for the costume. I don't think we need separate tags for the characters in that same costume, especially when there are at least two characters wearing it. So it's not like the costume is specific to a character.