Talking to myself...

Can you have two characters you own talk to each other or must they totally not talk and not know each other?

Yes, they can talk to each other. However, you can't post multiple times in a row except in the bunk areas, preferably of your characters, meaning you'll probably need to stick conversations outside of the cabins into one RP post unless you're posting with another person.

Example: You post one part of the conversation between your characters, and your partner posts next. Then you post again but with your second character, responding to your first and maybe your other character's reply.

Thanks.