I don't think that's possible, mostly because I feel that the story is more about grief and acceptance rather than bringing the real Hikaru back. Although, I won't say that I'm not kinda into Hikaru coming back, but because I've known 'Hikaru' for a long time now, I'm attached to him, lol
Will it possible to get Hikaru back after *Hikaru* is gone!? I hope he does tho