I don't think you can even comprehend the ramifications of Sui actually posting, if she can prove its herself, and how much that would shake chan culture as a whole…
meme magic would singlehandedly be proven completely 100% true in one fell swoop, /pol/ and /fringe/ would likely worship her as the coming of KeK himself
Seriously, it would have some very serious implications
Now… if she were posting anon, probably places like /kind/, /b/ obviously, /desu/. and /dolls/
Now in an egregorical sense she can be found anywhere desu is posted, /desu/, /b/, /a/, /pol/ sometimes, she used to frequent /int/ a lot but has since departed it for the most part, /b/ being here main stomping grounds and /desu/ being her throne room and shrine to her glory and /mai/, she led me here after all
technically though, she is already everywhere on 8ch
One of the servers is named Suiseiseki btw