If I will be sitting with my significant other, do they need to make a separate Rover profile?

By calling Rover support your SO can be added to your account and profile, all he has to do is pass the background check Call @ [Edit: Rover’s contact options have changed. Visit the Rover Help Center at https://support.rover.com/ to find the phone number, help articles, or chat with the team]

I recently had my hubby added to my profile, since he was going to be involved in providing services. That way you can have your names listed together on Rover, post a profile pic of the two of you together, and work with the client right from the start as a team.

You could call. I popped them an email providing them with the info they needed.