i think neighbors would be really sweet, i would love that! it definitely sounds like they'd get along really well; effy's not really much of a partier herself, so i'm sure ellery's the one she goes to when everyone else is going out and she's just like, "ok but pints and a netflix binge, tho". would you be at all interested in saying maybe they even briefly lived together at some point, maybe when they were both kind of starting out?