Humans...
do not try to imply that you know who Robin/Julia are, even worse is implying that there is a post somewhere in there that makes it obvious who it is. This will only make the Legals/ST scour the previous posts and eliminate the role-holder during the night. Do not take that chance.
If you do (as a Human) suspect that someone is Robin/Julia, divert attention away from them, even onto yourself if you have to to safeguard them. Study who Robin seems to be voting for and vote with them and subtly try to get other Humans to do so as well.
Regards,
a fellow Human