The Plot Armour Saviour

"PAS" for abbreviation

The definition of a character, usually a side character, who often or always saves the day for the sake of plot armour, or generally is the character who acts out the plot armour action, and/or allows the plot armour to take place. In order to be a PAS, you would not have any kind of credibility to be the saviour of the day at the given moment, and gives the hero to the rescue no reason to be there whatsoever.

Instances where a character tells about something that he/she/it has done off-screen (alternatively off-stage or off-page in the case of theatre plays or books and other text-based media respectively), but that is so incredibly important to the presented narrative that it should have been shown on-screen, makes that character qualified as a PAS.

One trait of a PAS can be that they defy their respective universe law, or act out of character during the plot armour moments.

Examples of PASs are Rey from Star Wars, the majority of the characters in The Room, and most of the side characters in horror movies that the monster devours in seconds, despite the monster spending like 5 minutes walking intimidately to our protagonists.

Person 1: Hey, did you watch that episode of Doctor Who where K-9 comes to the rescue out of nowhere?
Person 2: Yeah, he wasn't even present that much earlier in the episode! That was too good to be true. They didn't need to make him The Plot Armour Saviour, it ruined the whole experience for me.
Person 1: It drives me mad, K9 was such a PAS!