Sue/Remy
I'm sorry this wasn't your Atlantis so you could see him again.
Sometimes people need to hear things from someone who isn't so close to the situation. She'll need your support, but saying the things that get her past denial and closer to being able to deal with things may take someone else. If you want professionals, there's Sam, of course, or Professor Xavier. If you want someone who's been through that kind of thing, maybe Matt Murdock from the other universe? Or anyone else you can think of.