It's All My Fault
You see characters blaming themselves for major messes fairly often, especially when they're not the only ones who are suffering as a result. It's a universal phrase used in every genre and medium.
Frequent replies:
"It's not your fault": A stock reply to an apology, and like the main phrase, it's often followed by why. Often implies the main phrase as well. "There's no way you could have foreseen this" is also popular as is "You Did Everything You Could" when the other failed to prevent bad things from happening.
"I am also to blame"/"We're all to blame": As stated above, when the penitent one is neither completely blameless nor solely...read more