When the main character(s) of a movie, story,
game, or other
media manage to defy nearly all odds of being injured, killed, or otherwise majorly inconvenienced, it's
safe to assume they must have some sort of supernatural insurance policy protecting their asses. Especially when others immediately around them are not so lucky.
As well as avoiding the negative, characters with MCI often happen to stumble upon just what they might need for a given situation, out of the
blue.
This phenomenon could be chalked up to just plain dumb luck, or perhaps more likely unrealistic writing on the creator's part. Mary Sues and their variants are often gifted with Main Character Insurance.
Generally, when this occurs, it leads to a very unrealistic and
fantastical atmosphere, removing any seriousness there might have been.
(Watching a movie):
Viewer A: What the hell? This character has managed to
dodge bullets, stay underwater without drowning, and remain perfectly healthy in an outbreak of plague. On top of it, howcome the
key to the
safe was suddenly right there when everyone else has been looking for it for decades? That's just not fair.
Viewer
B: Yeah, he evidently must have some sort of main character insurance. Considering the shooters killed everyone else, his friend drowned quickly, and his girlfriend is now dying of plague. If he really found that
key so easily, it makes the other characters look
like total idiots. Something isn't right here.