Are there any Jaina fanfiction wikis?

Yes, there are wikis dedicated to Jaina Solo from the Star Wars Expanded Universe, now rebranded as Legends. "Wookieepedia" is a popular wiki where you can find information on Jaina Solo and fan-created content related to her character. Additionally, websites like FanFiction.net and Archive of Our Own host user-generated Jaina Solo fanfiction stories.