we have no proof yet just but based on her reactions to things and her continuous leniency to her brother treating the ML like shit we think she's evil. Like for example, in the most recent chapter as soon as she learns that he is dreaming of his father's death, which he has been told he committed, she immediately tells him to forget the events and start over. I find this extremely suspicious, it seems as if she is trying to have him forget something very specific which might prove his innocence or to forget something she did or lister did which would make them guilty instead.
He just feels like there's a bug in there, I've read the novel up to chapter 10 part 3 so feel free to ask for spoilers and questions
I saw some comments saying the sister was also evil like her brother. Could someone tell me what did they do to the mc / why is she also bad? And if possible what is this about a bug in his head? Does he really have one or did they lie to him so they can control him?