[This is not the first time someone has mentioned isekai here to Nagito.] If you didn't care about manners yourself, you wouldn't have cared how I address you, you know. As for isekai... I guess that is kind of what's happening. We're almost all from different worlds, even if we're in the same afterlife. There aren't any talking birds where I'm from, besides mimics like parrots and such.