Board Thread:General Discussion/@comment-4698889-20171205212736/@comment-66.139.155.126-20171206165929

I don't think the Mysterious Boy is anyone at this point, tbh. I think it's all just an allusion to a bunch of different events, since the one around where the chains was actually mentioned in the novels was Kyle given that's a line he says directly out of Handbeat Clocktower. Unless you want to argue Kyle is an Irregular, I don't think this counts as they appear nowhere near Allen.

As well, none of the events are particular to Allen. It might even be Adam or Hansel, we just don't know. I think the chapter title, as well, is misleading given it's split in two part: RE_Birthday AND Truth, not necessarily the Truth of RE_Birthday. Note that the Truth half doesn't even address what RE_Birthday means, but rather the truth of the world. We have no way of knowing if Allen's soul was purified, or if everyone was simply reincarnated.