I apologize in advance if I ask things that were already asked in the past, I have a terrible memory and it's been a fair bit since I really looked at the settings [I had to look back at my CS to remember who I was role playing to boot...]

-So does everyone's character knows each other's real name? 
-If so what was the alias for again?
-Do you have any qualms about our characters calling others by their family name if they're a senior or slightly-distant-friends? I don't... personally like putting "-san" or something at the end though, but since the setting is in Japan(?), I wondered how much of its culture do we need to reflect on the role play.