Alright, very, very late, but I think I'll build off of some of the other locations.

ヴィラ天狗さん/Tengu's Villa is located at the Western District; lets give that nice old lady who's taking care of the place a home, aye?
Tegami Oka is located at the Central District, as if we didn't have enough buildings there already; I'm gonna infer that Marc lives some blocks away from Miyane, so that's gonna be fun.
Teru Tiger Traceur Gym is located in the Northern District, surprise surprise; wonder how many of these districts are gonna be under utilized.

For NPC purposes, I swear that having Kurosawa as a last name was a complete accident, but part of me would find it a tiny bit compelling (and, possibly a pain in the ass for another character) if Takeshi Kurosawa was Marc's dad. Honestly, the guy strikes me as someone who would be his dads, possibly due to similar personality traits they have, plus it would possibly be interesting to see how he tries to get around his father when going about exploring the city, as well as what'll happen when he gets caught. How will they react to one another, etc. If the shoe doesn't fit, I'm cool with that, whats say you [@OwO]

For PC purposes, I'm more than fairly certain that Marc has probably snuck onto the set once or twice, though he probably booked it after getting caught. Probably investigating the area after picking up some (bs) story floating around in the off-topic section of the forum, stating things like the myriads of different apparatus the yakuza used there, as well as rumors of restless, tortured souls lingering there caused by the yakuza as well. If anything, unless you want to elaborate or discuss this further, Marc and Miyane would probably just be passing faces in the crowd, to her a blonde-haired fan or delinquent, and to him a weird mix of plain yet (possibly) moderately stylish? I dunno, thoughts [@banjoanjo]

And for another PC, I might be semi-clueless about how to handle this, as I don't know whether or not to count her as a passing face to Marc... especially since I placed a particular building in a similar area. Wanna brainstorm this a bit, or keep them as familiar faces that possibly have noted of each others existence [@Asuras]

I wonder if Marc has noticed anyone else... unless some people are poking and prodding around in different parts of the city, the red light district, or so on, I have no idea who else he might of came into contact with... so, uh, yeah. That'll be fun possibly seeing all these characters interact with one another for the first time.

Also, I'm all for discord. From what I've noticed, having one helps with keeping a rp alive... somewhat. Great for building a bit of a community, plus it allows for much faster communication there as opposed to the forums. The only issue is that the ooc would look as dead as a door nail. Plus, the group is a bit small, as Asuras said, but I do not know the benefit of a discord for a smaller group... but I'll still firmly advocate for it.