Bear in mind you have made this post on just one instance, Lemmy.world, if they aren't keen on you doing this for whatever reason there are many more instances around that could be more accommodating.

If you have people that are technically literate you could even spin up your own instance just for your community to register their accounts to. They would still be able to interact with the wider fediverse in the same manner if they wanted to post outside of your roleplays too!

as @[email protected] mentioned, we don't care about usage of multiple accounts generally.

we do prohibit the same person voting on content (their own or others') with multiple accounts, and obviously using multiple accounts for ban evasion is not allowed. spamming a community with multiple accounts pretending to be different persons should also be avoided unless the community explicitly allows it, which seems to how you want to do it based on your description.

It should be fine as long as you don't vote with several accounts for the same person

Feel free to also consider Piefed

• https://piefed.zip/
• https://join.piefed.social/features/

In my experience, Lemmy.world would probably be fine with this. They can sometimes be intransigent about certain things, but probably not this. That said, if it were me, I would choose a more open and acceptable instance with less authoritarian mods, for lack of a better term.