Hey there,
I believe the game guide is talking about roleplaying via the roleplay --> group roleplay. You have to register a wolf and make sure everyone has a turn by not double posting. You can only post for one character at a time, as you are registered as the wolf you chose.
However if you roleplay in the forums or via PM, you can have as many characters as you want. Though of course you should also try to not double post and give others a chance to respond. :)
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