>hermann ruined gregors life
>hermann ruined Sinclair's life by showing kromer the mirror(probably, looking very likely at this point)
>the whole deal with hermann and yi sang
>hermann ruined Heath's life by showing nelly and cathy the mirror
In canto 10 we'll learn that she was the reason behind the ''sun'' that ruined Meursault's life as well.

Hermann is an insect without hands and a mask for a face