Fitz - Uma is probably more than aware of the Proudfoots (Proudfeet? Ahhh LOTR!!!) and yeah if Fitz is fighting with Kent for reasons, she's likely to take Kent's side. And look up his criminal record. And such.
Freddy - Uma is going to need drinking buddies. Probably be familiar with the Adlers anyway.
Chuck - There is a bit of an age gap haha but maybe run ins.
Lina - She's the foxy Brightstar ;) and she'll probably have no idea who Lina is.