The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
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- Corrector Yui (8 members)
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- Haruna Kisaragi (1 member)
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- Policy (2 members)
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- Site administration (4 members)
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- Template documentation (64 members)
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- Watercooler (2 members)
- Yui Kasuga (1 member)
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