Uta is wearing the necklace Kaoru gave her, they're together I think.
Seriously, that is not the same necklace.
As circamoore says, for recurrent-motif purposes it ought to be the same necklace, and readers are welcome to create headcanon saying that Kaoru has continued to make artisanal bling for what is now her little sweetie bedmate (or whatever the fuck we prefer to imagine).
But, as ever, we're left with the question of whether we're supposed make something of this detail or not, and if so, what.
last edited at Oct 20, 2020 10:28AM