I know the brother doesn't want misunderstandings anymore but he knows she's about to die still right? Like if he remembers the pattern of what has happened so far with the sister. He doesn't have to say it in such a cold way. I feel bad for that girl. The main girl keeps meeting sad people with horrible lives and then she has to witness or just know they're gonna die. So depressing. And that one death guy has started manipulating things too, by talking to the girl and telling her what's gonna happen and what she should do etc.