What isekai character has
>Suffered the most
>Been betrayed the worst
>Regretted their actions the most
I only care about sufferkino, betraykino and regretkinos in my isekai, for they are the essence and basis of all things isekai. isekais that do not possess even one of these shouldnt even be called isekai and should be reported on-sight in these threads for being off topic.
With that being said, I need to know who they are, name them.