Graffiti is all about cycles of writing. Whether that be because of the authorities buffering off art or another writer spraying over your work with something better, there's a constant drive to improve and respray areas. The exception to this rule is a piece that you can't paint over with something better or something that has history to it, whether that be because of significance gained with age or the artist that sprayed it. Rekka's 2DMV art has a few interesting graffiti tidbits.
Off to the right of the Rekka art is a spray that appears to be a homage to Nagi. It's missing the "i" from "Nagi", but it's pretty obvious that it's meant to be Nagi with the N, A, and G in a white instead of black. Plus, the colors and flowers at the edges of the piece remind me very strongly of the Gekokujo set, when An is told that Nagi is dead.
In graffiti culture, the crown is something that is used as a symbol of a graffiti legend's piece or tag, something that is generally frowned upon for self-use by amateurs. It's a little displaced by the window(?) above the spray, but there's a crown above NAG. Nagi would definitely have earned the crown for her role in RAD WEEKEND and her presence on Vivid Street, so the crown makes complete sense. The fact that the bottom part of the crown above NAG looks like a halo, however, is an obvious reference to Nagi's dead status.
There's a lot of respect towards dead graffiti artists in graffiti culture. Graffiti is all about getting your art out there, and the biggest obstacles to that are the authorities buffing off walls, jail, and death. Considering Vivid Street is covered in graffiti, and it's a staple of the community, those first two are pretty much off the table.
With RAD WEEKEND as a tribute for Nagi's death to cover the main source of Vivid Street's beating heart, it was inevitable that there would be tribute graffiti.
One of the main rules of graffiti is that you don't spray over or vertically above another person's work unless you want to start a fight or your piece is more complicated/intricate/has more effort put in it than theirs. Above Kohane is a piece that, from what little I can see of it, looks like Vivid BAD SQUAD sprayed over RADDER or RAD WEEKEND. Spraying over it with their group name is a declaration of superiority, likely of their goal of surpassing RAD WEEKEND or foreshadowing how close they were to doing so.
Bonus Details:
There's a tag that says "HOPE!" underneath the maNAGe piece. How dramatically ironic.
Forgive the shakiness, I'm doing this on trackpad.
More of the flowers that are around maNAGe by An's feet
Very obvious crying decal between An's legs
Cinema sticker on the box(?) Akito's lounging on
Two "regret"s crossed out in red, one outlined in white and one written with a thick white that made me think about Kohane's Beat Eater card where she destroyed the "not" in "I'm not confident" to make a negative phrase positive
Anatomically correct heart with VBS colors
"up" with an arrow decal pointing up
Two clasped hands surrounded by fire
I'm fairly certain the word in black says "BELIEVE" based off what I can see poking out from behind the tree and the given letters
