It also occurs to me that there's a bit of vague backstory possibility with Banzu; his father was exiled from the city before he was born (so around 17 years ago). I haven't worked out exactly what happened in BNW-verse, since the details don't really affect Banzu in the present day, but it's possible that his father was involved with the Kuzuryuu family in some way? Dunno how that'd come up though, since Fuyuhiko would've been 3 at the time, Banzu doesn't know the details, and his legal name uses his mother's family name. Maybe he resembles his father a bit? idk the idea just popped into my head.