Re: Who was second-in-command?
 

Venus is diffinitly the second and command in the Manga. Really the leader under Usagi as Princess. I suspect the same will be true in Crystal. The anime doesnt have a clear second but actually feels like Mars is unofficially. But Mars has a more charasmatic personality in the original anime so that makes sense. Venus actually has a more laid back personality in the original anime. Havent seen PGSM so cant speak on that.