Talk:Mikami-Sensei/@comment-50.0.12.143-20121222034820/@comment-75.132.129.213-20130928213933

Reiko was a surrogate mother figure for Kouichi, nothing more, nothing less. The similar appearance doesn't suggest that they're actually the same person by any means. They're sisters, remember? Not identical, but they do have the same parents so they will have some similar features just through basic genetics.

And that just falls apart when you apply it to the calamity. Kouichi's mother and Reiko are two completely different people - and both dead ones at that. Kouichi and the rest of his family DO remember that his mother died when he was born, so that fact alone eliminates any possibility that she is the dead one because while the calamity is active no one remembers that person's death.