I don't if anyone mentioned this yet but for me, 'Hikaru' changing his name to Natsuki may be a trans allegory. He lived under the name of a boy who died, posing and acting as him. Now that he's free, he can finally choose his own name - his own self, free of the shackles of 'Hikaru' . As a trans man myself, it's similar to how I lived as a shadow of my old self for many years, standing in for her, before accepting the true me and going by my chosen name. It's probably more of a headcannon for me, but I just wanted to point that out.
I don't if anyone mentioned this yet but for me, 'Hikaru' changing his name to Natsuki may be a trans allegory. He lived under the name of a boy who died, posing and acting as him. Now that he's free, he can finally choose his own name - his own self, free of the shackles of 'Hikaru' . As a trans man myself, it's similar to how I lived as a shadow of my old self for many years, standing in for her, before accepting the true me and going by my chosen name. It's probably more of a headcannon for me, but I just wanted to point that out.