He's from this game called The Last of Us.
As much as i liked his story what would we really get from playing it? I mean, i'd love to hear the story of a community in that world, but we already know how Ish's story ends.
We don't know how it ends. He proves to be very resiliant and lucky, albeit careless. He's actually quite interesting for a character who only appears in notes, with a fleshed-out, carefree personality.