Ayu's late friend

[Delirium-Zer0]

Or it could just be that she wants to be respectful to the person's family. There might not be any shame in it at all. If, say, my best friend died & I was talking about it in excess in my blog, I doubt her mom would be too happy with me. But if I left her name off, it might not be a problem.

The other option is, of course, that she assumed that everyone knew who she meant when she said "aneki" in her blog, and to long-time fans in japan, it's been obvious this whole time who died.

Hard to tell, really.