Maxima would stop by Wrio's office pretty regularly just to update him on the status of various Fortress things, if he hasn't seen Wrio there in person - he's not super chatty himself or anything, but he definitely believes in the value of keeping clear lines of communication, and as one of the older people living there with more organizational experience than most, he's sort of instinctively taking it on himself to be a coordinator. At the end of the day, they are living in a fortress, and it has been attacked before, so...it's just better to feel prepared for anything, right?