Kathryne likely wouldn’t survive a day on her own, being blind and all. But alongside others, particularly my other MCs, probably several years. She’s scary smart so she’d be a big asset to any group of survivors.
Bacon on his own could likely last for 6 months or more. He weighs so much he’s practically his own barricade. He’s also really good at finding food. But he’d probably sacrifice himself for others at some point.
Senienna could easliy last a year or more by themselves. They’re highly athletic, optimistic, have learned survival skills and are very clever, not smart per se, but clever.