Okay, it sounds like we're mostly settled on LL0, so I'll stick there. 

Our first mission will probably end up being just one battle anyway, so we'll move up a level quickly. 

So, the game actually also has a fun(I think) way of randomizing relationships between characters. Basically you go around the "table" and for each other player there's a d20 table that you can roll on with stuff like "they tried to kill me once" or "they saved my life" or "I'm in love with them."

When I first did this story, it was like in the Magnificent Seven where it was a group of randos that got pulled together, but I've come to believe that have a predetermined connection between all the players can be helpful. If you want to roll on that chart for each other, feel free. 

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